Installing libgtk2.0-0_2.10.11-0ubuntu3_i386.deb will resolve this issue. I can reproduce whether I've run firefox or not, and on a freshly booted system if I have libgtk2.0-0_2.11.6-1ubuntu3_i386.deb installed. I'm running gutsy. Never had the problem before upgrading. This is also probably a duplicate of other bugs that are open involving high CPU and nspluginviewer/Xorg.
Installing libgtk2. 0-0_2.10. 11-0ubuntu3_ i386.deb will resolve this issue. I can reproduce whether I've run firefox or not, and on a freshly booted system if I have libgtk2. 0-0_2.11. 6-1ubuntu3_ i386.deb installed. I'm running gutsy. Never had the problem before upgrading. This is also probably a duplicate of other bugs that are open involving high CPU and nspluginviewer/ Xorg.