What steps will reproduce the problem?
Try to enter an offset for In Combat, Unit Frames, Other Tooltips

What version of the product are you using?
1.11.43b (r556)

Do you have an error log of what happened?
Date: 2010-09-21 22:37:04
ID: 1
Error occured in: Global
Count: 1
Message: ..\AddOns\StarTip\Modules\Position.lua line 203:
   attempt to compare number with table
Debug:
   (tail call): ?
   StarTip\Modules\Position.lua:203
      StarTip\Modules\Position.lua:202
   (tail call): ?
   [C]: ?
   [string "safecall Dispatcher[2]"]:9:
      [string "safecall Dispatcher[2]"]:5
   (tail call): ?
   ...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:691
      ...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:612
   (tail call): ?
   [C]: ?
   [string "safecall Dispatcher[3]"]:9:
      [string "safecall Dispatcher[3]"]:5
   (tail call): ?
   ...AdvAchhievmentTracker\Libs\AceGUI-3.0\AceGUI-3.0.lua:314 Fire()
   ...ter\Libs\AceGUI-3.0\widgets\AceGUIWidget-EditBox.lua:69
      ...ter\Libs\AceGUI-3.0\widgets\AceGUIWidget-EditBox.lua:66
   ...ter\Libs\AceGUI-3.0\widgets\AceGUIWidget-EditBox.lua:109
      ...ter\Libs\AceGUI-3.0\widgets\AceGUIWidget-EditBox.lua:106

Please provide any additional information below.
World Units without that validation check sets fine.