Pocket Gnome has discontinued development of this software, and made it open-source. A community member has picked it up, and now makes newer versions that work with the newer clients. The latest version (1.3.7h) is compatible with WoW 3.1.3.
Get it here: http://www.savorydeviate.com/pocketgnome/forum/viewtopic.php?f=7&t=2158
If you run into this problem, I believe it was caused by not having write permissions to /opt/ and derivitives. Make sure you enable those, and you should be fine.
Audacity is great. You can record stuff, and then edit out the mess-ups, put pauses in songs, and create mash-ups. And it's all for free. The Mac and Windows versions are extremely stable, and after a month or two of use have yet to crash. Go open-source!
+1
EasyCapViewer
Sturmen reviewed on 14 Oct 2009
Shameless plug: by one for $10.99 from DealExtreme! http://www.dealextreme.com/details.dx/sku.5707~r.76136188
Pocket Gnome
Get it here: http://www.savorydeviate.com/pocketgnome/forum/viewtopic.php?f=7&t=2158
FrameByFrame
sturmen reviewed on 18 Jun 2008
eMux
Screenshot of MaNGOSx.app's contents:
http://screencast.com/t/rtjCJuuswEk
+1
Audacity
Sturmen reviewed on 23 Oct 2005
eMux
http://screencast.com/t/dYNVz7Ui