TBB 2.2.x for Linux Firefox tries to load skypebuttons.so, crashes
the new ff4 tor-browser-bundles for linux, 64-bit crashes with:
Apr 01 14:39:33.523 [info] (firefox:stderr): ./App/Firefox/firefox-bin: symbol lookup error: /usr/lib/mozilla/plugins/skypebuttons.so: undefined symbol: _ZN9QListData11detach_growEPii
Mozilla is not installed on the system otherwise.