Unable to scan: The file is a decompression bomb.

After a thoroug scan I have this result:

[i]
Name of File:
C:\Documents and Settings\Gonzalo\Local Settings\Application Data\Mozilla\Firefox\Profiles\p4mdctti.default\Cache\OA158C3Bd01{gzip}

Results:
Unable to scan: The file is a decompression bomb.

Operation:
Error occurred during moving file to ochest: The file is a decom[/i]pression bomb.

This sounds very bad. What can I do?

I have Window XP Professional Service Pack 3 (build 2600) :-[

Check out this post:

http://forum.avast.com/index.php?topic=8943