I noticed the other day that my Tab key seemed to stop working on my local machine.  At the time I was connected to a remote laptop on the other side of the room, but didn't think anything about it.  A little while later it started working again, so I thought it might just be as a fluke.

Today, I rebooted the local PC - tab was working.  I did an unattended connection to the laptop and noticed the tab stopped working, but it was working on the remote machine (checked that thinking it might be the keyboard).  I disconnected from the laptop and the LOCAL tab started working again.

Any ideas?