Where did you find that text and in what files have you been fumbling already?

Good luck

I realized that I have been editing a bunch of core files (which didn't have to...)

all I needed to do was to edit the skin "_rss2" files.

_rss2\comments.main.php had the text.

Thanks. Fixed now.

Here's a fun one. Don't know if you care, but I edited my _rss2/comments.main.php file to say "Username response to:" by replacing

echo format_to_output( T_('In response to:'), 'xml' )

with

echo $Comment->author('',' response to:','',' response to:','xml')

nice.

What's your blog URL?