Pressing the up arrow moves the cursor up 2 lines, pressing down moves the cursor to the bottom of the file.
I am running the newest version released Jan 12. This is not happening anywhere else on my system (textmate, safari, etc), so I don't think it's a stuck key. I've tried different file types, same result. I have nothing in my key bindings preference.
Anybody seen this or have some things I can try?