Version? This sounds like a svn-1313 bug, fixed in later. Probably should be running 1359.
svn-1417 running on mac os x 10.4.8.
At the default debug log level only these errors in the system.log seem to have happened around the same time, don’t know if they are related:
crashdump: bfobserver crashed
launchd: com.apple.dnbobserverd: exited abnormally: Bus error
I’ll run the server with a more detailed log level for a while and wait for the issue to reappear.