For every character i typed into the searchbox, a crash happened. Quodlibet ver 3.0.2 Ubuntu 14.04 LTS 64bit

Give the PPA a try: https://quodlibet.readthedocs.org/en/latest/downloads.html#ubuntu

Because Google Code is going away [0] we've moved this bug tracker to GitHub.

This issue is now available at

https://github.com/quod-libet/quodlibet/issues/1608

In case you are still interested in this issue and have a GitHub account, you can subscribe to the new issue using the "Subscribe" button on the right hand side of the page.

[0] http://google-opensource.blogspot.co.at/2015/03/farewell-to-google-code.html