First, thanks for WordPress, best CMS on the net!
After upgrading to WordPress 3.05 from version 3.04, the images that were in my comments no longer show up. To make sure it was the upgrade, I installed WordPress 3.04 on a new domain, no plugins.
I added a picture to a post and to that post's comment. The picture in the post and the comment show without problems.
I then upgraded to version 3.05. When I view the same post and comment, the image in the post shows but the image in the comment does not.
My temporary solution was to copy these files back from 3.04:
Hope that helps!