Increasingly often I've got problems with not being able to close Internet Explorer windows with the default 'C' close action, which - according to the configuration - simulates ALT-F4.
Often it doesn't close the window but puts the focus in some searchformfield (like [url=http://www.php.net)]http://www.php.net)[/url] which is not what I want. Just a few minutes ago it even sended an unfinished post to a board, which I originally wanted to abort.
I just changed Keyboard-Shortcut / Alt-F4 to Window.PostMsg / WM_Close and it seems to work. Haven't tested too much yet, but don't expect any more trouble.
Just FYI if any one of you had the same problem like me :)