This code works for me just fine, both local and live site:


/**
* Recent Comments Style Removal
*/

function my_remove_recent_comments_style() {
add_filter( 'show_recent_comments_widget_style', '__return_false' );
}
add_action( 'widgets_init', 'my_remove_recent_comments_style' );

If the above code does not display properly take a look at http://pastebin.com/W1rdRxx1 same code as in TwentyTen functions.php

It works on my local install, but not my live site. I even tried playing with the priority but to no avail.

I am using your code to remove the action which is identical to the code in the TwentyTen theme. There is even a person who left a comment on my blog stating that the TwentyTen function does not work. Any ideas?

Just note: this fix goes in the THEMES functions.php not the wordpress core functions.php