Weird fsck

[Jim Bevier]

Yesterday while booting up a new OS (Athlon 64 X2 kernel 2.6.21-1.3189.fc7), 
the root ext3 partition had been mounted 20 time and the system said a check 
was required.  It failed with an uncorrectable error.  I tried it again and 
again it failed and dropped me into a shell prompt.  I know there should not 
be any error.  So, I booted into FC6 which ran the check on the partition 
when booting..  It passed OK.  Rebooting into FC7 booted up OK.  Is this 
some sort of voodoo magic or is there some reason for this weird fsck 
error???

Jim