http://bugs.winehq.org/show_bug.cgi?id=14296
--- Comment #1 from markk@clara.co.uk 2008-07-04 18:51:15 --- A problem related to this is that (parts of) some buttons are "unclickable".
For example, load WINHELP.HLP from Windows XP into Wine winhelp. If you click on the right half of the Expand button, instead of the action occurring, a flashing cursor appears to the right of the button. In order for the Expand/Collapse feature to work, you must click the left half of the button.