FIX: Skype 4.3 for Linux crashes after start
Yesterday,
Microshit forced all Linux Skype users to update to version 4.3 and made is "impossible" to keep your chat history.
Reason being, they changed something in the main.db so it is now incompatible with Skype Version 4.3 on Linux (Ubuntu).
However, there is a simple fix when Skype 4.3 for Linux crashes after start, as the issue has to do with files that were sent and received.
$ sqlite3 ~/.Skype/[YOURUSER}/main.db
sqlite> DELETE FROM Messages WHERE type=68;
sqlite> .quit
Once you are logged into skype, it will re-add your recently sent and received files, so most of them will be back in the history.
Enjoy!
Source: http://community.skype.com/t5/Linux/Skype-4-3-crash-on-ubuntu-14-04/td-p/3219892/page/2
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