What steps will reproduce the problem?
To be honest I do not know since i noticed the message in chat from time to time so I activated taint log

What is the expected output? What do you see instead?
I see the "Interface action blocked because of an AddOn" and I expect not to see that.

What version of the product are you using?
1.5-11

Do you have an error log of what happened?
10/9 20:05:28.988  (for generator)()
10/9 20:05:28.988  An action was blocked in combat because of taint from Skada - <unnamed>:Hide()
10/9 20:05:28.988      Interface\FrameXML\WorldMapActionButton.lua:58 <unnamed>:Clear()
10/9 20:05:28.988      Interface\FrameXML\WorldMapActionButton.lua:67 <unnamed>:Refresh()
10/9 20:05:28.988      Interface\FrameXML\WorldMapActionButton.lua:19 <unnamed>:SetMapAreaID()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:1140 WorldMapFrame_Update()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:2869 WorldMapFrame_UpdateMap()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:408
10/9 20:05:28.988      SetMapToCurrentZone()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:341
10/9 20:05:28.988      WorldMapFrame:Show()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2336 <unnamed>:SetUIPanel()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2138 <unnamed>:ShowUIPanel()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2048
10/9 20:05:28.988      <unnamed>:SetAttribute()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2830 ShowUIPanel()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2814 ToggleFrame()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:236 ToggleWorldMap()
10/9 20:05:28.988      TOGGLEWORLDMAP:1
10/9 20:05:28.988  (for generator)()
10/9 20:05:28.988  An action was blocked in combat because of taint from Skada - <unnamed>:ClearAllPoints()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:1332 WorldMapFrame_SetOverlayLocation()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:1355 WorldMapFrame_UpdateOverlayLocations()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:1141 WorldMapFrame_Update()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:2869 WorldMapFrame_UpdateMap()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:408
10/9 20:05:28.988      SetMapToCurrentZone()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:341
10/9 20:05:28.988      WorldMapFrame:Show()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2336 <unnamed>:SetUIPanel()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2138 <unnamed>:ShowUIPanel()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2048
10/9 20:05:28.988      <unnamed>:SetAttribute()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2830 ShowUIPanel()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2814 ToggleFrame()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:236 ToggleWorldMap()
10/9 20:05:28.988      TOGGLEWORLDMAP:1
10/9 20:05:28.988  (for generator)()
10/9 20:05:28.988  An action was blocked in combat because of taint from Skada - <unnamed>:SetPoint()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:1338 WorldMapFrame_SetOverlayLocation()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:1355 WorldMapFrame_UpdateOverlayLocations()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:1141 WorldMapFrame_Update()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:2869 WorldMapFrame_UpdateMap()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:408
10/9 20:05:28.988      SetMapToCurrentZone()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:341
10/9 20:05:28.988      WorldMapFrame:Show()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2336 <unnamed>:SetUIPanel()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2138 <unnamed>:ShowUIPanel()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2048
10/9 20:05:28.988      <unnamed>:SetAttribute()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2830 ShowUIPanel()
10/9 20:05:28.988      Interface\FrameXML\UIParent.lua:2814 ToggleFrame()
10/9 20:05:28.988      Interface\FrameXML\WorldMapFrame.lua:236 ToggleWorldMap()
10/9 20:05:28.988      TOGGLEWORLDMAP:1
10/9 20:05:28.989  (for generator)()
10/9 20:05:28.989  An action was blocked in combat because of taint from Skada - <unnamed>:Hide()
10/9 20:05:28.989      Interface\FrameXML\WorldMapActionButton.lua:58 <unnamed>:Clear()
10/9 20:05:28.989      Interface\FrameXML\WorldMapActionButton.lua:73 <unnamed>:Refresh()
10/9 20:05:28.989      Interface\FrameXML\WorldMapActionButton.lua:26 <unnamed>:SetHasWorldQuests()
10/9 20:05:28.989      Interface\FrameXML\WorldMapFrame.lua:872
10/9 20:05:28.989      WorldMap_UpdateQuestBonusObjectives()
10/9 20:05:28.989      Interface\FrameXML\WorldMapFrame.lua:1142 WorldMapFrame_Update()
10/9 20:05:28.989      Interface\FrameXML\WorldMapFrame.lua:2869 WorldMapFrame_UpdateMap()
10/9 20:05:28.989      Interface\FrameXML\WorldMapFrame.lua:408
10/9 20:05:28.989      SetMapToCurrentZone()
10/9 20:05:28.989      Interface\FrameXML\WorldMapFrame.lua:341
10/9 20:05:28.989      WorldMapFrame:Show()
10/9 20:05:28.989      Interface\FrameXML\UIParent.lua:2336 <unnamed>:SetUIPanel()
10/9 20:05:28.989      Interface\FrameXML\UIParent.lua:2138 <unnamed>:ShowUIPanel()
10/9 20:05:28.989      Interface\FrameXML\UIParent.lua:2048
10/9 20:05:28.989      <unnamed>:SetAttribute()
10/9 20:05:28.989      Interface\FrameXML\UIParent.lua:2830 ShowUIPanel()
10/9 20:05:28.989      Interface\FrameXML\UIParent.lua:2814 ToggleFrame()
10/9 20:05:28.989      Interface\FrameXML\WorldMapFrame.lua:236 ToggleWorldMap()
10/9 20:05:28.989      TOGGLEWORLDMAP:1
10/9 20:05:28.997  Global variable UIDROPDOWNMENU_MENU_LEVEL tainted by Skada - Interface\FrameXML\UIDropDownMenu.lua:38
10/9 20:05:28.997      securecall()
10/9 20:05:28.997      Interface\FrameXML\UIDropDownMenu.lua:64 UIDropDownMenu_Initialize()
10/9 20:05:28.997      Interface\FrameXML\WorldMapFrame.lua:2051 WorldMapLevelDropDown_Update()
10/9 20:05:28.997      Interface\FrameXML\WorldMapFrame.lua:2870 WorldMapFrame_UpdateMap()
10/9 20:05:28.997      Interface\FrameXML\WorldMapFrame.lua:408
10/9 20:05:28.997      SetMapToCurrentZone()
10/9 20:05:28.997      Interface\FrameXML\WorldMapFrame.lua:341
10/9 20:05:28.997      WorldMapFrame:Show()
10/9 20:05:28.997      Interface\FrameXML\UIParent.lua:2336 <unnamed>:SetUIPanel()
10/9 20:05:28.997      Interface\FrameXML\UIParent.lua:2138 <unnamed>:ShowUIPanel()
10/9 20:05:28.997      Interface\FrameXML\UIParent.lua:2048
10/9 20:05:28.997      <unnamed>:SetAttribute()
10/9 20:05:28.997      Interface\FrameXML\UIParent.lua:2830 ShowUIPanel()
10/9 20:05:28.997      Interface\FrameXML\UIParent.lua:2814 ToggleFrame()
10/9 20:05:28.997      Interface\FrameXML\WorldMapFrame.lua:236 ToggleWorldMap()
10/9 20:05:28.997      TOGGLEWORLDMAP:1
10/9 20:05:28.997  Execution tainted by Skada while reading UIDROPDOWNMENU_MENU_LEVEL - Interface\FrameXML\UIDropDownMenu.lua:1070 UIDropDownMenu_ClearAll()
10/9 20:05:28.997      Interface\FrameXML\WorldMapFrame.lua:2056 WorldMapLevelDropDown_Update()
10/9 20:05:28.997      Interface\FrameXML\WorldMapFrame.lua:2870 WorldMapFrame_UpdateMap()
10/9 20:05:28.997      Interface\FrameXML\WorldMapFrame.lua:408
10/9 20:05:28.997      SetMapToCurrentZone()
10/9 20:05:28.997      Interface\FrameXML\WorldMapFrame.lua:341
10/9 20:05:28.997      WorldMapFrame:Show()
10/9 20:05:28.997      Interface\FrameXML\UIParent.lua:2336 <unnamed>:SetUIPanel()
10/9 20:05:28.997      Interface\FrameXML\UIParent.lua:2138 <unnamed>:ShowUIPanel()
10/9 20:05:28.997      Interface\FrameXML\UIParent.lua:2048
10/9 20:05:28.997      <unnamed>:SetAttribute()
10/9 20:05:28.997      Interface\FrameXML\UIParent.lua:2830 ShowUIPanel()
10/9 20:05:28.997      Interface\FrameXML\UIParent.lua:2814 ToggleFrame()
10/9 20:05:28.997      Interface\FrameXML\WorldMapFrame.lua:236 ToggleWorldMap()
10/9 20:05:28.997      TOGGLEWORLDMAP:1
10/9 20:05:28.997  Interface\FrameXML\WorldMapActionButton.lua:24 SetHasWorldQuests()
10/9 20:05:28.998  An action was blocked in combat because of taint from Skada - <unnamed>:ClearAllPoints()
10/9 20:05:28.998      Interface\FrameXML\WorldMapFrame.lua:1332 WorldMapFrame_SetOverlayLocation()
10/9 20:05:28.998      Interface\FrameXML\WorldMapFrame.lua:1355 WorldMapFrame_UpdateOverlayLocations()
10/9 20:05:28.998      Interface\FrameXML\WorldMapFrame.lua:481
10/9 20:05:28.998  Interface\FrameXML\WorldMapActionButton.lua:24 SetHasWorldQuests()
10/9 20:05:28.998  An action was blocked in combat because of taint from Skada - <unnamed>:SetPoint()
10/9 20:05:28.998      Interface\FrameXML\WorldMapFrame.lua:1338 WorldMapFrame_SetOverlayLocation()
10/9 20:05:28.998      Interface\FrameXML\WorldMapFrame.lua:1355 WorldMapFrame_UpdateOverlayLocations()
10/9 20:05:28.998      Interface\FrameXML\WorldMapFrame.lua:481
10/9 20:05:29.167  Interface\FrameXML\WorldMapActionButton.lua:24 SetHasWorldQuests()
10/9 20:05:29.167  An action was blocked in combat because of taint from Skada - <unnamed>:ClearAllPoints()
10/9 20:05:29.167      Interface\FrameXML\WorldMapFrame.lua:1332 WorldMapFrame_SetOverlayLocation()
10/9 20:05:29.167      Interface\FrameXML\WorldMapFrame.lua:1355 WorldMapFrame_UpdateOverlayLocations()
10/9 20:05:29.167      Interface\FrameXML\WorldMapFrame.lua:481
10/9 20:05:29.167  Interface\FrameXML\WorldMapActionButton.lua:24 SetHasWorldQuests()
10/9 20:05:29.167  An action was blocked in combat because of taint from Skada - <unnamed>:SetPoint()
10/9 20:05:29.167      Interface\FrameXML\WorldMapFrame.lua:1338 WorldMapFrame_SetOverlayLocation()
10/9 20:05:29.167      Interface\FrameXML\WorldMapFrame.lua:1355 WorldMapFrame_UpdateOverlayLocations()
10/9 20:05:29.167      Interface\FrameXML\WorldMapFrame.lua:481
10/9 20:05:29.294  Interface\FrameXML\WorldMapActionButton.lua:24 SetHasWorldQuests()
10/9 20:05:29.294  An action was blocked in combat because of taint from Skada - <unnamed>:ClearAllPoints()
10/9 20:05:29.294      Interface\FrameXML\WorldMapFrame.lua:1332 WorldMapFrame_SetOverlayLocation()
10/9 20:05:29.294      Interface\FrameXML\WorldMapFrame.lua:1355 WorldMapFrame_UpdateOverlayLocations()
10/9 20:05:29.294      Interface\FrameXML\WorldMapFrame.lua:481
10/9 20:05:29.294  Interface\FrameXML\WorldMapActionButton.lua:24 SetHasWorldQuests()
10/9 20:05:29.294  An action was blocked in combat because of taint from Skada - <unnamed>:SetPoint()
10/9 20:05:29.294      Interface\FrameXML\WorldMapFrame.lua:1338 WorldMapFrame_SetOverlayLocation()
10/9 20:05:29.294      Interface\FrameXML\WorldMapFrame.lua:1355 WorldMapFrame_UpdateOverlayLocations()
10/9 20:05:29.294      Interface\FrameXML\WorldMapFrame.lua:481
10/9 20:05:30.868  Global variable UIDROPDOWNMENU_MENU_LEVEL tainted by Skada - Interface\FrameXML\UIDropDownMenu.lua:38
10/9 20:05:30.868      securecall()
10/9 20:05:30.868      Interface\FrameXML\UIDropDownMenu.lua:64 UIDropDownMenu_Initialize()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:2051 WorldMapLevelDropDown_Update()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:2870 WorldMapFrame_UpdateMap()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:408
10/9 20:05:30.868      SetMapToCurrentZone()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:341
10/9 20:05:30.868      WorldMapFrame:WorldMapFrame:()
10/9 20:05:30.868      Interface\FrameXML\UIParent.lua:2336 <unnamed>:<unnamed>:()
10/9 20:05:30.868      Interface\FrameXML\UIParent.lua:2138 <unnamed>:<unnamed>:()
10/9 20:05:30.868      Interface\FrameXML\UIParent.lua:2048
10/9 20:05:30.868      <unnamed>:<unnamed>:()
10/9 20:05:30.868      Interface\FrameXML\UIParent.lua:2830 ShowUIPanel()
10/9 20:05:30.868      Interface\FrameXML\UIParent.lua:2814 ToggleFrame()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:236 ToggleWorldMap()
10/9 20:05:30.868      TOGGLEWORLDMAP:1
10/9 20:05:30.868  Execution tainted by Skada while reading UIDROPDOWNMENU_MENU_LEVEL - Interface\FrameXML\UIDropDownMenu.lua:1070 UIDropDownMenu_ClearAll()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:2056 WorldMapLevelDropDown_Update()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:2870 WorldMapFrame_UpdateMap()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:408
10/9 20:05:30.868  Interface\FrameXML\WorldMapActionButton.lua:24 SetHasWorldQuests()
10/9 20:05:30.868  An action was blocked in combat because of taint from Skada - <unnamed>:ClearAllPoints()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:1332 WorldMapFrame_SetOverlayLocation()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:1355 WorldMapFrame_UpdateOverlayLocations()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:481
10/9 20:05:30.868  Interface\FrameXML\WorldMapActionButton.lua:24 SetHasWorldQuests()
10/9 20:05:30.868  An action was blocked in combat because of taint from Skada - <unnamed>:SetPoint()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:1338 WorldMapFrame_SetOverlayLocation()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:1355 WorldMapFrame_UpdateOverlayLocations()
10/9 20:05:30.868      Interface\FrameXML\WorldMapFrame.lua:481
10/9 20:05:31.211  CloseDropDownMenus()
10/9 20:05:31.211  An action was blocked in combat because of taint from Skada - <unnamed>:Hide()
10/9 20:05:31.211      Interface\FrameXML\WorldMapActionButton.lua:58 <unnamed>:Clear()
10/9 20:05:31.211      Interface\FrameXML\WorldMapActionButton.lua:67 <unnamed>:Refresh()
10/9 20:05:31.211      Interface\FrameXML\WorldMapActionButton.lua:19 <unnamed>:SetMapAreaID()
10/9 20:05:31.211      Interface\FrameXML\WorldMapFrame.lua:390
10/9 20:05:31.211      WorldMapFrame:Hide()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2320 <unnamed>:SetUIPanel()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2347 <unnamed>:MoveUIPanel()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2378 <unnamed>:HideUIPanel()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2052
10/9 20:05:31.211      <unnamed>:SetAttribute()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2846 HideUIPanel()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2812 ToggleFrame()
10/9 20:05:31.211      Interface\FrameXML\WorldMapFrame.lua:219 ToggleWorldMap()
10/9 20:05:31.211      TOGGLEWORLDMAP:1
10/9 20:05:31.211  CloseDropDownMenus()
10/9 20:05:31.211  An action was blocked in combat because of taint from Skada - <unnamed>:Hide()
10/9 20:05:31.211      Interface\FrameXML\WorldMapActionButton.lua:58 <unnamed>:Clear()
10/9 20:05:31.211      Interface\FrameXML\WorldMapActionButton.lua:67 <unnamed>:Refresh()
10/9 20:05:31.211      Interface\FrameXML\WorldMapActionButton.lua:26 <unnamed>:SetHasWorldQuests()
10/9 20:05:31.211      Interface\FrameXML\WorldMapFrame.lua:391
10/9 20:05:31.211      WorldMapFrame:Hide()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2320 <unnamed>:SetUIPanel()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2347 <unnamed>:MoveUIPanel()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2378 <unnamed>:HideUIPanel()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2052
10/9 20:05:31.211      <unnamed>:SetAttribute()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2846 HideUIPanel()
10/9 20:05:31.211      Interface\FrameXML\UIParent.lua:2812 ToggleFrame()
10/9 20:05:31.211      Interface\FrameXML\WorldMapFrame.lua:219 ToggleWorldMap()
10/9 20:05:31.211      TOGGLEWORLDMAP:1

Please provide any additional information below.
I'm not seeing this frequently, and I'm not sure what triggers it.