Comment 9 for bug 531583

I can recreate this easily with the package in the archive. I've not yet managed to recreate it yet when I download it from a.m.o.

If I install the xpi from the version in our archive to my local profile, then that also works ok. However, I can make it fail if I install the addon in my ~/.mozilla/firefox/xxxxxxxx.xxxx/extensions as a symlink to elsewhere in my home folder.