On 9.04 when you install mono from the repos by following these instructions, (and opt not to install ASP.Net 2.0 and just go with the default of 1.0) then you end up with a mis-configuration of the web server - it's looking for the 2.0 version of the .Net framework when all you have is 1.0. This will be evidenced by these lines in /var/log/apache2/error.log Read more
For ages I put up with random hangs and where some or all of my panels would stop responding, and completely rebooting was the only solution (killall gnome-panels wouldn't unfreeze things either; all the hung panels disappear, but then nothing comes back in their place)...
I knew it had something to do with connecting to other computers by using gnome's "Connect to Server" feature, and since the problem only happened intermittently and listless googling didn't turn up anything I just lived with it. Read more