TeXstudio does not properly handle internal SVN errors. It freezes, and freezes the entire (unity) desktop, requiring a reboot to clear up the problem. We've had this happen a half a dozen times since starting our latest project.
These are not critical errors in the repo, either. They're simply problems in the working directory that SVN easily clears up itself by running the "cleanup". These kinds of errors need to be handled much more gracefully.