Trouble with Firefox...

Ok, I have the latest Firefox, and I am having an issue I cannot seem to resolve.

When I am typing it sometimes flips back to the previous page as if I had pushed the back button. It seems to happen when I push the shift key plus some other key (I can't figure out which one). Its very annoying b/c when it goes back I often have to start over typing whatever it was I was typing in the first place. I believe this has to do with firefox b/c it never did this in IE.

Can someone please tell me where to turn this annoying option off? Thank you so much!

It does it with the backspace button if you are not in a text box

i haven't found a way to get rid of it yet

The problem is that I am in a text box, and I'm not pressing the backspace. I can't figure out what it is, because when i just type to try to figure it out it dosen't do it.

After a little searching, IN the text box it seems to be tab & backspace, the tab key takes you to the post reply box and then backspace works like above

Thank you so much for the help. I don't think that I'm pressing the back buton when it happens, but I will pay more attention...maybe it is my computer! Then again maybe its just me!

http://www.mozilla.org/support/firefox/keyboard

has a full list of shortcuts, maybe you can find what you are clicking in there?

Thank you so much for that link!! I think I may have figured out what I'm doing...