HiI backported 5.0.21 from sid to sarge and got the same problem with key file corruption. After checking the source and even the source tar ball from mysql.com this bug is not fixed in 5.0.21!
You can find the patch for this bug on http://lists.mysql.com/commits/5625 Korbi -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]