Published posts revert to Drafts

After about a year of not doing anything with my site, I finally ran a bunch of updates (WP and my plug-ins) and started posting to the site via sharing pics from an iphone using a plug-in called photostream-sync. It creates a draft post with my gallery in it, and I only have to go in to add text and then publish it.

The only problem is the post reverts back to a draft shortly thereafter. The last post on my blog has been published 4 times now, but keeps going back to draft. This is really frustrating since I have it set to update my facebook page when I publish, and within an hour or so it becomes a bad link since the post turns into a draft again.

What could cause this??

Thank you!