If you upgrade WordPress and suddenly get a plain blue theme…
don’t panic!
You just have to go in and re-activate your old theme after you’ve updated.
I just upgraded, and a few things did go crazy (like the random symbols splashed through my posts.) The fun comic book smileys aren’t working, and won’t until I edit the page again … which probably won’t be until I have more time to do my big website update (eek, and the primer!)
If you run into any big problems though (it won’t let you comment, you get error pages) please give me a shout.