I encountered a problem either with cwm or tabbeb (http://tools.suckless.org/tabbed/). If I use cwm as my window manager and start tabbed with an XEmbed supported application like xterm, surf or st (e.g. tabbed xterm -into) and then I resize the window of tabbed.
Before doing something else with the application inside tabbed I try to close the instance with CTRL+Q (which is inherited from tabbed to close the application). The result is cwm crashing and i'll be greeted by the xdm login window. Unfortunately there is no relevant (imho) output to the Xorg logs. Does the problem exist for others and how can I further debug it?