Any luck on replicating the problem, Sean?
I just thought of something that 'may' be causing my error. I set-up my blog on a different server that it is now as I knew I was switching over to Wordpress at the time. So I got everything just right then transferred the files, database etc. as per instructions on Wordpress for moving servers.
Everything else other than scheduling a post is fine (that doesn't work for me). I'm wondering if it could be this that's causing it?
If there's anything else I could check in the meantime, let me know.
Thanks