Skype has been a continues stream of disappointments over the last few years.
First they started with this policy of taking away your credits if you haven't used them in a few years. They are still kind enough to let you "reactivate" them. This is like a bank taking your savings because you haven't used them in a while, but allowing you to get them back by dropping by. Its immoral and should be illegal.
Recently they also blocked access from the linux skype client 220.127.116.11 without any warning whatsoever, suddenly you just can't connect. And after updating to the latest version (18.104.22.168), it crashes every time. Turns out you have to do some changes to the sqlite database that holds your history (couldn't they do that automatically?).
Unfortunately opensource IM isn't much better. With so many usability issues, slow development (thinking about pidgin and gajim), and now Google turning their back on openness by disabling XMPP federation, the landscape of opensource IM looks gloomy.