When you need to capture something from your screen, there is a great program which does the job for you, xvidcap.
However, if you try to launch it in Fedora 11 you notice that no sound is available for the clips you make (whereas all other applications, like skype, work well).
If you launch that from the command line you notice an error message:
[user@localhost ~]$ xvidcap
Error accessing sound input from /dev/dsp
I will not waste your time telling infernal stuff about the pulseaudio things, just a command to cure that:
sudo modprobe snd-pcm-oss
Launch xvidcap and notice everything works out now. Please note that you will need that command any time you are going to use xvidcap, it does not have any effect after the reboot, you will have to re-issue this command again.