I'm running a fairly new install of 10.04 using a happy hacker keyboard because I'm an emacs user. I've already turned off most of the bindings in 'preferences->keyboard shortcuts' and modified the layout options 'preferences->keyboard' to set 'Meta is mapped to Win keys'. Everything is working well except some rat b*stard program is stealing -n and -m. This seems to cause a sort of inverse video effect in both cases, with -n affecting only the current window and -m affecting the entire desktop, so I suspect that this is the window manager but I can't figure out where this might be configured so I can change it. Anybody got any ideas?
You've discovered Compiz' colour inversion feature :-)
To get rid of it, install the Compiz configuration settings manager (ccsm) ,
You can also disable the feature altogether, by removing the check mark in the side bar on the left.