I managed to solve the issue. Somehow my permissions got set to 1411. I reset them back to the correct permissions and was able to regain access to my blog. Not sure how that happened but I’m up and running again 🙂
Just to follow up, tech support at HostGator was able to track down the problem. If you’re getting those errors, just go to support and tell them:
Just let them know you need the rule 340163 whitelisted for domain.com as its hitting a mod_sec rule.
Apparently you will need to do have them do this for each domain you’re experiencing the issue on, but it works.
I’m starting to think that’s the issue, but when I spoke to them they insisted it must be an issue with the theme, even though I setup a blog with that exact theme just yesterday with identical settings and it was working perfectly until today, as were other blogs using the same theme and now they are all mysteriously broken.
