At some point late yesterday evening WordPress released the 2.9.1 update patch which has the fixes to the bugs that were found in 2.9, and trust me there were a hell of a lot of bugs found in 2.9.
It fixes a lot of problems, but the most important ones are the blank page when leaving comments and the scheduling bug (scheduled posts not publishing when meant to).
It also contains security solutions that were spotted in the original release.
I’d advise everyone to upgrade as soon as possible.
Image by Gerd Altmann from Pixabay