I use Aptana Studio 3 and Subversive as SVN connector. After checkout some SVN repository, I got that it was failed process. There no confirmation or something alert, but suddenly all my files in the pointed folder was deleted. Yes, it entirely deleted and not in Trash.
I just luck have a Gitosis repository which have backup 1 day ago. If you curious why this happen, it because subversive plugin. So, I recommend you to use subeclipse for Eclipse or Aptana.
If you need the installation Guide, just follow this link :