Xine constantly locks fluxbox and completely kills X to the point of a hard reboot. I contacted the developer of flux and he gave me a patch that he thought would fix it. I looked into the ebuild, but could not make it work flawlessly. I would gladly test it if someone could add it to a test ebuild...
Created attachment 2130 [details, diff] Patch from fluxbox developer
The patch seemed to have worked, because the problem no longer exists in the r5 release.