Keyboard Symbols Appearing On Screen

[iMacFan78]

For some reason, whenever I press the Shift, Option, Control, or Command keys, their symbols appear in the center of the screen. It also appears that if I press one of them too many times, the key gets turned on permanently until I press it again. I'm on Leopard and have an Apple aluminum keyboard.

Edit: I solved the problem by pressing the Shift key 5 times. I'm curious about what this is, though. It reminds me of StickyKeys on Windows.

 

[thirdeyeopen666]

It is Sticky Keys. Sys Prefs->Universal Access->Keyboard

 

[jrlcopy]

It is Sticky Keys. Sys Prefs->Universal Access->Keyboard

Sorry to bring back this old thread, but THANK YOU... Just bought a macbook air with Lion in the UK and it had this enabled and was driving me up a wall. Wonder why it was defaulted on.