Re: fix to: RSS XML Parsing Error
There is no additional space nor new line in front of the <?xml version="1.0"?> line in rss2.php
This file is identical to the default (kakumei) theme rss2.php file
I deleted the “old” and replaced it with the one from kakumei folder.
And yes, I did upgrade to a newer version. 
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Update:
It’s fine now. 
We had this _blah.php file in my-plugins dir that had just a typed space in it. I deleted it and now the rss feed is fine.
Thanks for all your help
I deleted the space from file and it’s fine now.