Time Machine Preparing

After upgrading to Leopard 10.5.2, I noticed that my Time Machine never backed up any files... it would just hang on the "preparing" mode. This is apparently a common problem with the current upgrade, so if you have run across this issue, check out this post:

http://www.macfixit.com/article.php?story=20080219115528865

None of those options actually worked for me. What I ended up doing was deleting the backup directory and letting TM just redo a full disk backup. I recommend this only as a last resort, since you will lose all historical data. But if you only use the backup as a fail-safe like I do, it's no big deal.