Scheduled posts are not being posted (missing schedule)

Have you tried:

– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the Twenty Ten theme to rule out any theme-specific problems.

– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.

I’ve been having the same problem since moving to GoDaddy 4GH hosting (Wp 3.1.2) and fixed the problem by editing the timeout value in cron.php.

I wrote up a post with the details which might help (there are also two other possible solutions listed in the post).