WordPress 2.3.3 Broken Feed (Infinite loop error)

Hi all:

First off, want to say many thanks in advance for reading this. I know multiple threads get started a day and it can get daunting to go through them all.

OK, so here’s my deal:

I just upgraded WordPress to 2.3.3 and my feed is currently not working. (Here is my site: https://www.wearethepostmen.com/)

Seems I’m getting the dreaded infinite loop error. Looking at this forum, it seems it could perchance be a plugin that is tripping me up. (I tried deactivating them. Nothing seemed to work.) Basically, there is something that is causing the loop to not close, I’m just not sure what it is. (And why it was working with older versions of wordpress.)

Any ideas? Does anyone have the capabilities to look into this via curl or liveHTTPheaders?

Many thanks in advance.