In [6914], the Manage / Media Library screen is broken, in several ways. Some of these could be problems with the Upload windows accessible from the Post Edit screen, I am not sure of the causes.
a) If I upload a file using the single-image upload/insert window from the Post Edit screen, it shows up in the Media Library as not attached to a particular post. (To be more specific, in the "Appears With" column, it shows "(no title)" and the link goes to post=0.) If I use the Gallery window to upload, it shows up as attached to a post.
b) The times are wrong. I uploaded a file, then visited the Media Library screen just a minute or two later, and it told me the uploads happened 58-60 minutes ago. If I refresh a few minutes later, it says 55 minutes ago.
c) The delete functionality doesn't work. I check one or more boxes (tried with just one; tried with several) and click the Delete button, and I get a screen with title "WordPress Failure Notice" saying "Are you sure you want to do this?" with a link saying "Try again", which just takes me back to the Media Library screen (and nothing has been deleted).