Blogger has updated it's posting interface now, adding more features including text colors, lists, justification, and fonts and sizes. However, it doesn't seem to play too nice with Mozilla. Sometimes it'll lose CSS(?) support and only the text will show up, and I have yet to publish a post and get confirmation that it was uploaded afterwards. Yes, I downloaded the latest Mozilla and no, I'm not going to download Firefox.
No clue what the problem is, but hopefully it'll blow over soon. Mozilla was the only browser that worked with Blogger on the Mac, so I'm depending on it to work.
Update
I think it's working again now!