Trying to tweak my RSS feeds off the site, I encounter this error:

This page contains the following errors:
error on line 2 at column 1: Extra content at the end of the document
Below is a rendering of the page up to the first error.

Looking at the source code, we see this result:

<br />
<b>Fatal error</b>:  Unknown: Cannot use output buffering in output buffering display handlers in <b>Unknown</b> on line <b>0</b><br />

Which isn't good at all.  Turns out, all we need to do is this to resolve it:

In our case it was due to increasing the number of RSS feeds we had increased too.  The hosting account ran out of memory, in essence, where it couldn't even print a legitimate answer as to the real error.  One thing to do might be to set the following option to Summary instead:

For each article in a feed, show	For each article in a feed, show  Full text  Summary

to only show a brief intro to each RSS feed instead of the full one.  The other is to decreate the number of listed RSS feeds.

There are other sources that suggest plugins, disabling stuff, changing themes but that seems a bit heavy handed to me and sounds like alot of work.

Cheers,
TK