Disk First Aid can't repair

[Siri Huntoon]

Help! I froze & rebooted last night and got a message from Disk First
Aid that it found problems it couldn't repair & I should back up
everything immediately. Here's the message:

Checking disk "Macintosh HD".
Checking "Mac OS Standard" volume structures.
Checking wrapper System file.
Checking "Mac OS Extended" volume structures.
Checking for locked volume name.
Checking extent BTree.
Checking extent file.
Checking catalog BTree.
Problem: Invalid key length, 4, 194
Test done. Problems were found, but Disk First Aid cannot repair
them.

What happened to my hard drive? My computer boots up and appears to
function. Is this an emergency or just some wierd thing?

Of course I'm on a deadline and it would be a nightmare to take my
computer to be fixed right now.

Any help at all much appreciated.

[sir oinks a lot]

try norton disk doctor or disk first aid using the startup cd that came
with your mac some repairs can only be done if the hd is not the active
startup disk.

In article <c35b91a1.0112...@posting.google.com>, Siri

[B Collins]

Could also try TechTool