Simple FIX for RSS feed validation problem / error – not validating.

Been googling for answers and have found nothing, then stumbled on this crazy simple fix.

A bunch of my sites’ RSS feeds were having a problem / error not validating when I tried to check them at http://feedvalidator.org/

I would get this validation error:
line 1, column 1: Blank line before XML declaration

I tried deactivating my plugins – that didn’t work.

I tried switching themes to default TwentyTwelve – that worked, so it had to be something in my theme.

Turns out it was a very simple problem with my functions.php file in my theme…

There were extra spaces at the end of the functions.php file after the closing php ?> tag.

I just removed all the spaces before and after the closing php tag and PRESTO – all is good everywhere.

Hope this helps some people.