Yeah agree…slicer broke due to a broken STL. I try and preview my Gcode of complex objects before I print with something like http://buildlog.net/gview/
I used Slic3r RC 3 for this, and also the print before. In the previous print I checked" with support" and the support basically became one with the print… Can’t break it off.
I ran it through netfabb as @Alexey_Isachenko suggested a couple times, and then I figured out how to actually use it… just click all the “fix” buttons you can find!