this lomanager message appears if a previous interrupted lomanager run is detected. In this case, there will be a file /tmp/xsulomanager left in the system. However, this temporary file should not be there before lomanager is invoked. Now, if lomanager finds that file, and this file is older than 12 secs, then it assumes that this file is from a previous incomplete run and it will remove it. And you see, that's what happened. After that running lomanager as normal user should work fine.
Don't think this should have something to do with a gtk theme.