Skype has been hit by a bug recently that causes the messaging app to crash when an instant message with “http://” and nothing else is sent. It affected Skype on Windows, Mac, iOS, and Android. The workaround involved having to reinstall the app after asking the sender to delete the original text. The latest update from Skype though is said to remedy this. You no longer have to do a fresh install to get rid of the bug.
Source: Apple Insider | Download: Skype