File Manager Problems with 3.1

I am still having problems with File Manager Super User in 3.1. If I set /tmp/mcop-dbtrol to owned by root this works fine but on booting I get an error from arts that there is a sound server fatal error because /tmp/mcop-dbtrol is not owned by user. If I change the directory to be owned by user then File Manager Super User comes up and immediately shuts down. How do I fix this or is this a known bug. TIA David