Dev-C++ Version: 18.104.22.168 portable (IDE only)
OS Version: Window 7 Home, 64-bit
I've already reported this unofficially in the "Translations" thread, but I hadn't tested it thouroughly. Now I have, it works fine on WinXP Pro SP3 32bit, but NOT on Win7 Home 64bit.
When I open any dialog and press the ALT key (e.g. to enable keyboard navigation) most dialog controls vanish. The show up again only on (blind) mouseover... sometimes even a click is needed for them to reveal themselves.
Here's a screenshot demonstrating the problem: http://img546.imageshack.us/img546/5194/devcppportable.jpg
The dev-c++ download was: Dev-Cpp 22.214.171.124 IDE Only Portable.7z (https://sourceforge.net/projects/orwelldevcpp/files/Portable%20Releases/)