Just a headsup.
Posting presented no errors.
Then I applied the patch on mosquito to fix the 304 error on all of my feeds.
Immediately after, I went to make a post, hit publish, and the page went blank.
The post was published. Refreshing does not work either - still blank. Same thing happens if I delete a post.
I guess I spoke to soon about it being a flawless upgrade, eh.