I don't know why it's crashing , here is a log http://pastebin.com/UyvfmtSL . I can't restart xfce from command line, every time it crashs I have to reboot my computer.
I'm using xfce4 / linuxmint 13 / dual monitor and a nvidia GeForce 7300 GT.
When does it crash? Did you try with other input devices? Another desktop environment? Another distribution? Only one monitor plugged in? The other graphics driver? (nouveau/nvidia)
Thanks for replying, I figured out, isn't a xfce problem. When using gnome I had the same kind of problem.