Unexpected SHIFT key events

[idlefrog]

Hi all, I've got an event filter that's monitoring keystrokes. When I type some characters such as 'A', 'B', 'C', or whatever letter of the alphabet, I get KeyPress events that have the keyEvent->key() value of Qt::Key_Shift.
I'm not pressing shift, and my keyboard is working fine.
What could possibly be making these rogue shift key events?
What's the best way to hunt down this error?

[SGaist]

Hi,

Might be a silly question but do you have Caps Lock activated ?

[idlefrog]

@SGaist Haha.. umm... I wish! I suspect somewhere elsewhere I have a naughty bug.

[SGaist]

Any event filter installed ?

[artwaw]

@idlefrog what is your environment? I mean OS, Qt kit?