Ok, this is so weird that I had to post about it. I just posted this post:
And the original had this paragraph in place of the fourth one down (not counting the edit as a paragraph):
"When I had fully vacuumed the dog hair beneath where the bed had been and replaced it back in the prominent spot next to my bed, she wouldn't come near it. Rather she decided to curl up in a ball in the corner of the room."
With that paragraph, I received a 403 Forbidden error when posting. So I removed all the text (because I knew I could post, I had not that long before with not a problem) and then added in each paragraph one by one....
Anyway, it seems so random and weird and I can't explain it. I tried it on another WP install I have running and it wouldn't post there either.
Strangest thing ever....
EDIT: and for clarification (in case you don't click over to the post), I was referring to my dog.