What steps will reproduce the problem?
1. Open the map

What is the expected output? What do you see instead?
The game freezes every 1-2 seconds when the map is opened

What version of the product are you using?
3.4

Do you have an error log of what happened?
REPEATED MORE THAN 100 TIMES A SECOND
9/30 23:28:02.391  Execution tainted by ACP while reading UIDROPDOWNMENU_MENU_LEVEL - Interface\FrameXML\UIDropDownMenu.lua:656 UIDropDownMenu_GetSelectedID()
9/30 23:28:02.391      Interface\FrameXML\UIDropDownMenu.lua:435 UIDropDownMenu_AddButton()
9/30 23:28:02.391      Interface\AddOns\ACP\ACP.lua:1515 SortDropDown_Populate()
9/30 23:28:02.391      Interface\AddOns\ACP\ACP.lua:1504 initFunction()
9/30 23:28:02.391      Interface\FrameXML\UIDropDownMenu.lua:69 UIDropDownMenu_Initialize()
9/30 23:28:02.391      Interface\AddOns\ACP\ACP.lua:1504 SortDropDown_OnShow()
9/30 23:28:02.391      ACP_AddonListSortDropDown:OnShow()
9/30 23:28:02.391      ACP_AddonList:Show()
9/30 23:28:02.391      Interface\FrameXML\UIParent.lua:1738 <unnamed>:SetUIPanel()
9/30 23:28:02.391      Interface\FrameXML\UIParent.lua:1543 <unnamed>:ShowUIPanel()
9/30 23:28:02.391      Interface\FrameXML\UIParent.lua:1469
9/30 23:28:02.391      <unnamed>:SetAttribute()
9/30 23:28:02.391      Interface\FrameXML\UIParent.lua:2179
9/30 23:28:02.391      ShowUIPanel()
9/30 23:28:02.391      GameMenuButtonAddOns:OnClick()

Please provide any additional information below.
Using the italian client.