So... I added new repositories to YAST2 so that I could get things like mp3 support etc. The repositories gave me a warning saying they 'weren't digitally signed' which was fine, I chose to ignore that.

I started YAST2 and went to obtain the various codecs and all... What I encountered was the largest set of dependancy problems I've ever seen... EVERY single package that had been installed on my system before that point gave me a dependancy error.
I would ahve been allowed to just ignore it and go on, but I didn't want to mess with my only working linux install without consulting someone first.

Anyone else experienced this and how should I handle it?

Maybe the repository didn't fit your SUSE installation?

You need to pick a repository that was made for the version you are using.

Perhaps that is it, I'll try working on that when I boot up SUSE again..