There are many bugs in Subversive besides the known bug “Can not compare with old deleted repository resources“.
And yesterday, one of my colleague used Subversive’s “Check out as” to a different location resulted in deleting all her one-week modifications. I think it was a bug that Subversive did not warn her that it was going to delete modified sources in “Check out as” mode!
In my experience, I found Subclipse is a much better plugin. So Subversive sucks.