XML Feed Finally Validating

I just fixed one of the most confounding problems I’d ever come across on WordPress, so I’m sharing how I did it because I definitely couldn’t find the solution after weeks of trying.

See I was trying to get the valid XML feed for a particular Tag or Category from this blog, a process I’ve instigated on PLUG’s mailing list, so that the PLUG website can aggregate feeds tagged as ‘plug’ or ‘open source’ or ‘foss’ voluntarily submitted by its (currently 130+ strong) membership.

The problem was when I try to get the feed URL, for example:

http://www.lefthandedlayup.com/index.php/tag/plug/feed

I get this error:

XML Parsing Error: xml declaration not at start of external entity
Location: http://www.lefthandedlayup.com/index.php/tag/plug/feed
Line Number 2, Column 1:

<?xml version=”1.0″ encoding=”UTF-8″?>
^

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