Seems like mediatomb is crashing and causing the WD MyBook World to crash and remount the fileystem in read-only mode.
If I do not run Mediatomb the device stays up and running for days on end.
However when I start Mediatomb (installed according to instructions in http://www.jpkessler.de/mybookupnp/index.html), the system is fine for several hours but eventually Mediatomb consistently crashes and causes the WD MyBook to mount in read-only mode.
Contents of /var/log/messages:
Jan 7 04:44:18 MyBookWorld user.alert kernel: journal_bmap: journal block not found at offset 7180 on md1
Jan 7 04:44:18 MyBookWorld user.err kernel: Aborting journal on device md1.
Jan 7 04:44:18 MyBookWorld user.crit kernel: ext3_abort called.
Jan 7 04:44:18 MyBookWorld user.crit kernel:
Jan 7 04:44:18 MyBookWorld user.crit kernel: Remounting filesystem read-only
Pretty certain Mediatomb is causing this. Any help would be greatly appreciated.