This page contains the following errors:
error on line 2 at column 6: XML declaration allowed only at the start of the document
Using Twenty Eleven theme.
Looked at other threads which generally blame plugind, so I deactivated all the plugins and the problem remains.
Based on the other threads, I looked at feed-rss2.php feed-rss.php and feed.php they all seemed to have a blank line at the end of the file, which I removed just to see if it helped, and it did not.
I'm stuck at this point.