"corrupted orphan linked list" on my home filesystem

[Robert P. J. Day]

  for the second time in a few days, my /home filesystem
(/dev/fc5/home, the name being a holdover when i was running FC5 under
LVM2 on this system) magically reverted to "read-only" status, forcing
me to reboot, at which point i was told:

  "Inodes that were part of a corrupted orphan linked list were
found."

requiring e2fsck to fix all sorts of apparent corruption.

  once is a bit weird, twice is a definite pattern.  has anyone else
seen this lately?  kernel is 2.6.18-1.2868.fc6.

rday

p.s.  the "mount" command insisted that the filesystem was still
mounted "rw", and trying a "remount" had no effect.