- Relax. Take your time. Screwing around aimlessly with plugin files often makes things wors.
- Create a new workspace.
- ... (some magic here)
Yes. After wrestling with a misbehaving subversive plugin for a few hours between yesterday and today, filing bug reports with eclipse and generally scouring the web for answers (strange that few people had the same issue I was having = here's a clue), someone made a comment on a website somewhere about having a corrupt workspace.
15 minutes later. Problem solved and I was even able to import my existing projects.