That was the problem, I had put the example plugin in,
and remove the folder when my eclipse hangs and
refuses
to start.

Hmm. We shouldn't be aborting with no error message when
a plugin .so file is missing : that's not right. I'm not sure if this
has always been broken (seems unlikely) or is some issue with
the underlying shared library opening code in NSPR that has
changed underneath us. Either way I think this should be fixed
sometime. Worst case we can stat the file first.