http://bugs.winehq.org/show_bug.cgi?id=9661
--- Comment #12 from Nick nick@customdesigns.ca 2009-04-03 16:14:36 --- At the very least this bug could be confirmed, it's not difficult.
1) Turn on sticky keys in your preferred Desktop Environment 2) Fire up some simple text app in wine 3) Push shift 4) Release shift 5) Press a letter key, it should be upper case, but it won't be.
In my opinion this bug should have been fixed for 1.0. It literally makes using wine for some apps impossible for some people even though those apps may be listed as gold or platinum.