Great!
User Account corruption just happens from out of nowhere, I can't explain why.
The best thing is all your data has been saved and if you want you can download OnyX which will run maintenance tasks to keep things running smoothly.
Sometimes a perfectly fine HD can go belly-up for no apparant reason so running a program like OnyX (there are many others too) can be viewed as preventative medacine.
Some people swear blind that you don't need any 3rd part S/Wto keep your mac in tip top shape, just use disc utility to repair permissions but it's up to you...
BTW, if you download a lot of 3rd party s/w....repairing permissions afterwards is good.
Here's a link about maintenance on your mac.
http://www.macworld.com/2005/01/features/preventmacdisasters/index.php
Glad it's all sorted out.... :biohazard
