For some reason, a bunch of users of Skype had their Skype start crashing recently. It literally was out of the blue; one day it was working, and the next day, Skype started crashing as soon as you typed any message to anyone. We checked the Skype forums, and this issue was pervasive.
While there is no known fix for this version, the fix we all used was to upgrade to the beta version 5.7:
Run that upgrade, and hopefully like the rest of us, your Skype will start working again.
You know, I have used Skype for at least six years, and I have to say, I’ve never seen so many issues since Microsoft purchased it. Thanks Microsoft