What steps will reproduce the problem?
1. Have this addon running on 6.2 PTR
2.
3.

What is the expected output? What do you see instead?
It breaks the Blizzard Quest Tracker, I can only see one or two quests on the tracker, and I get the error below.

What version of the product are you using?
6.1 Alpha version via Curse Client

Do you have an error log of what happened?
Message: Interface\FrameXML\UIParent.lua:2415 attempt to index field 'PlayerPowerBarAlt' (a nil value)
Time: 05/23/15 10:41:19
Count: 1
Stack: Interface\FrameXML\UIParent.lua:2415 in function `UIParentManageFramePositions'
Interface\FrameXML\UIParent.lua:1888 in function <Interface\FrameXML\UIParent.lua:1875
[C]: in function `SetAttribute'
Interface\FrameXML\UIParent.lua:2604 in function `UIParent_ManageFramePositions'
[string "*:OnShow"]:4: in function <[string "*:OnShow"]:1>
[C]: in function `Show'
Interface\FrameXML\ReputationFrame.lua:351 in function `ReputationWatchBar_Update'
[string "*:OnEvent"]:6: in function <[string "*:OnEvent"]:1>

Locals: self = <unnamed> {
 0 = <userdata>
 ShowUIPanel = <function> defined @Interface\FrameXML\UIParent.lua:1895
 UpdateUIPanelPositions = <function> defined @Interface\FrameXML\UIParent.lua:2238
 HideUIPanel = <function> defined @Interface\FrameXML\UIParent.lua:2186
 UIParentManageFramePositions = <function> defined @Interface\FrameXML\UIParent.lua:2338
 MoveUIPanel = <function> defined @Interface\FrameXML\UIParent.lua:2170
 ShowUIPanelFailed = <function> defined @Interface\FrameXML\UIParent.lua:2099
 SetUIPanel = <function> defined @Interface\FrameXML\UIParent.lua:2106
 GetUIPanel = <function> defined @Interface\FrameXML\UIParent.lua:2230
}
yOffsetFrames = <table> {
 1 = "reputation"
 2 = "castingBar"
}
xOffsetFrames = <table> {
}
hasBottomLeft = nil
hasBottomRight = nil
hasPetBar = nil
(*temporary) = nil
(*temporary) = PlayerPowerBarAlt {
 0 = <userdata>
 spark = <unnamed> {
 }
 scale = 1
 pillFrames = <table> {
 }
 unit = "player"
 flash = PlayerPowerBarAltFlash {
 }
 flashOutAnim = <unnamed> {
 }
 isPlayerBar = true
 statusFrame = PlayerPowerBarAltStatusFrame {
 }
 counterBar = PlayerPowerBarAltCounterBar {
 }
 flashAnim = <unnamed> {
 }
 background = <unnamed> {
 }
 frame = <unnamed> {
 }
 fill = PlayerPowerBarAltFill {
 }
}
(*temporary) = false
(*temporary) = nil
(*temporary) = false
(*temporary) = "1280x800"
(*temporary) = "1280x960"
(*temporary) = "1280x1024"
(*temporary) = "1360x768"
(*temporary) = "1366x768"
(*temporary) = "1400x1050"
(*temporary) = "1440x900"
(*temporary) = "1600x900"
(*temporary) = "1600x1024"
(*temporary) = "1600x1200"
(*temporary) = "1680x1050"
(*temporary) = "attempt to index field 'PlayerPowerBarAlt' (a nil value)"
menuBarTop = 75

Please provide any additional information below.