Skype Needs QT7
By templedf on Jun 09, 2007
On the off chance that you're trying to run Skype 2.6 on a MacOS X 10.3.9 machine, you should be aware that you'll need to have QuickTime 7.x installed. Without it Skype won't even start. Unfortunately, the Skype support forums don't say that. I finally managed to find the secret here.
Interestingly, when searching for this problem, the vast majority of the sites I found that talked about it weren't in English. Does this mean that the non-English-speaking parts of the world are more likely to still be running 10.3 than we are?