I'm using Openbox on 11.10 under a gnome/openbox session. Every so often, Openbox will stop accepting keyboard and mouse input. When this happens, none of my keybindings work, and while I can move the mouse pointer around, clicking does not accomplish anything.
When this happens, my only recourse is to switch to a text console (Ctrl-Alt-F1) and kill Openbox. This logs me out, and when I login again, everything is working.
I'm not sure how to even go about troubleshooting this. Has anyone else experienced this problem?