Sounds like it is someone who has access to your computer. I know you said you have changed your password, but do you save your password so you don't have to enter it each time? Could someone be playing a joke on you? Hopefully, for your peace of mind, it won't happen again. You have to admit, his thread was kinda funny.
Deb

 

It's definitely wierd. This thread is pretty harmless, but you should see some of the other posts this "imposter" posts under his screen name. S2000's suck, cursing, etc., etc. Some people were getting a little p'ed off.

I think it's pretty funny...

 

Hey nick, just thought I'd add this in for you - you can edit old posts of yours so if you DO see posts that aren't yours you can just click the edit button next to it and delete the offending text.

 

Either that, or maybe he really did lose to a cavalier...