When our fix for "Modules not appearing" went out it made a small change in the way images are published that caused errors on some users sites.
If you see a page that tells you that "PHP is not enabled on your account" the fix is simply to load your site in the editor and republish.
We have added code that will prevent that state from occuring again.
Our support team has been informed and will be giving out this information as well.
Sorry for an inconvenience this may have caused.