Sometimes I highlight text in my browser and CTRL+C and when I CTRL+V there is nothing there to paste. The hotkey just doesn't work. If I right click and choose copy and then right click and choose paste it works fine.

Only happens in FF, only occasionally. Most of the time I can restart FF and the issue is gone but not always. This has happened since the last 2 updates.

No virii, trojans or malicious beasties lurk here.

Any suggestions will be appreciated.

Same here, I find mashing Ctrl C about 6 or 7 times in quick succession works.. Or you could be boring and right click of course

never seen this, i just tried it quickly and it works fine here atleast, most of the times ill just select text and right click -> search web for ...
you sure its not something with the kb?

def not the K/B, its firefox, ive been having the same problems

Yup it's one of the FF's bugs, installed This extension and never had problems after that