I've noticed a problem with multi-line edit boxes in AceGUI. If the length of the edit box exceeds its displayed height, then its clickable area will also exceed its visible area.
This can be verified by placing a multi-line edit box in your options menu, and giving it a description. Now enter enough text into the edit box to make it scroll down several lines (easy by just holding the return key for a few seconds). Now place your cursor above the edit box, and a tooltip will appear with the name and description of your edit box, even though you are not hovering directly over the visible portion of the edit box. If you scroll back up to the top, then it is now the bottom portion of your edit box which is clickable beyond its visible area.
This can prove problematic if you have options buttons such as checkboxes above or below your multi-line edit box, as clicking those will actually result in a click on the invisible portion of your edit box.