QUOTE(Raul Liive @ Wed Nov 29 2006, 15:21) [snapback]325329[/snapback]
Tiger is not supported by Skype at the moment.
Tiger is 10.4 and is the current stable release, its 10.5 (leopard) that's not supported.
The preferences stopping thing seems quite common. The usual fix is to to find your skype plist file and trash it.
1. Quit Skype
2. Go to ~/library/Preferences
3. Trash com.skype.skype.plist
4. Relaunch skype.
It wasn't totally clear whether you had done this from your 1st post.