I still have this problem...
Renaming all dot-files in $HOME I can only login if I use icewm as window manager. All the other will fail. With icewm I can run some programs, while attempting to open others will log me out. Again, this is for all users. Programs that will crash the window manager are: gv, texmaker, skype, avidemux, etc. Programs that will not crash the window manager are: xterm, firefox/iceweasel, thunderbird/icedove, gimp, etc.
I was hoping that upgrading further will be of some help, so I went ahead from stable to testing but I face the same problems still.