[X4U] Tiger does not install here

[Xavier Noria]

Before the update to Tiger from an up-to-date Panther I repaired 
permissions as usual. After a couple of dialogs the Tiger installer 
says it is verifying the disk, and after a while it says there was an 
error and a restart is needed.

I've attached a handful of lines from the bottom of 
/private/var/log/install.log, any ideas? I work daily with this 
computer and never had a problem with the disk. What would you 
recommend to do?

-- fxn

Apr 28 17:22:36 localhost : Checking volume bitmap.

Apr 28 17:22:36 localhost : ESC[31mVolume Bit Map needs minor 
repairESC[0m

Apr 28 17:22:36 localhost : Checking volume information.

Apr 28 17:22:36 localhost : ESC[31mInvalid volume file countESC[0m

Apr 28 17:22:36 localhost : Apr 28 17:22:36 localhost : Apr 28 17:22:36 
localhost : (It should be 669961 instead of 669985)

Apr 28 17:22:36 localhost : ESC[31mInvalid volume free block countESC[0m

Apr 28 17:22:36 localhost : Apr 28 17:22:36 localhost : Apr 28 17:22:36 
localhost : (It should be 2965399 instead of 2965387)

Apr 28 17:22:36 localhost : ESC[31mVolume Header needs minor 
repairESC[0m

Apr 28 17:22:36 localhost : Repairing volume.

Apr 28 17:22:39 localhost : Apr 28 17:22:39 localhost : The volume 
Macintosh HD could not be repaired.

Apr 28 17:22:39 localhost : Verify/Repair failed with error -9972 (The 
underlying task reported failure on exit)
Apr 28 17:22:39 localhost : Mounting Disk

Apr 28 17:22:40 localhost : Install failed: Target volume is damaged 
and cannot be repaired by the Installer.
Apr 28 17:22:40 localhost : Private/Total = (8.1MB, 35.1MB),  
Heap/Total = (3.8MB, 18.7MB),  Regions(malloc, private) = (41, 30)
Apr 28 17:22:40 localhost : It took 400.718530 seconds to 
unsuccessfully install "Mac OS X" (41 pkg(s))
Apr 28 17:22:40 localhost :     It took 400.718068 seconds to 
<IFVolumeConsistencyCheckElement: 0x6a01d60>
Apr 28 17:22:40 localhost : Entering Finish Up section
Apr 28 17:22:40 localhost : Physical Memory Allocation:    63 MB wired, 
    59 MB active,    56 MB inactive,   178 MB used,   333 MB
  free,   512 MB total
Apr 28 17:22:42 localhost : Apr 28 17:22:42 localhost : Summary 
Information
Apr 28 17:22:42 localhost : Type           Elapsed time (sec)
Apr 28 17:22:42 localhost :          script           0.000000
Apr 28 17:22:42 localhost :            zero           0.000410
Apr 28 17:22:42 localhost :         receipt           0.000000
Apr 28 17:22:42 localhost :            disk           400.718120
Apr 28 17:22:42 localhost :         install           0.000000
Apr 28 17:22:42 localhost :
/private/var/log/install.log,1458