Version: 3.0.2 (using KDE KDE 3.2.1) Installed from: Compiled From Sources Compiler: gcc 3.3.3 OS: Linux Minor glitch but easy to reproduce so it should be fixed. 1. Click the full-screen button on the tool-bar. 2. Type Alt-space to open the window menu and select "Full-screen" from the Advanced submenu. The toolbar button is left in the "Exit full-screen" state.
What Qt version? If older than 3.3.1 do you have the relevant patches from qt-copy applied (#0026, ...)?
Qt 3.3.1 compiled from source.
KDevelop probably just needs to use KToggleFullScreenAction like e.g. Konqueror does.
KDevelop uses KToggleFullScreenAction now and this bug is gone.