CompleteRSS 1.0 and save function


I'm not sure is it due to upgrading to Wordpress 2.2. My current problem is when I "save" a post in Wordpress, I always get the warning message
Warning: Cannot modify header information - headers already sent by (output started at /home/www/blog/wp-content/plugins/CompleteRSS_1.0.php:40) in /home/www/wp-includes/pluggable.php on line 329
If I disable CompleteRSS or remark the linke 40
(echo $content;)
then the message will disappear. Do you have any idea about this problem? Only "save" button, "Save and Continue Edigint" is ok.
Hi dennys, nice to see you again,

Only reason you'd be getting that error is if there is a blank line at the bottom of CompleteRSS.php, after the ?>

Try removing the ?> completely, that should take care of it.
I tried, but it doesn't work. I download the file from here again and I also use ultraedit's HEX mode to make sure ">" is the last character.
Is there any other possibilities?

btw, just curious, why "save" function triggers CompleteRSS? It should only be triggered by wp-rss2.php or wp-atom.php.
It is :S

That's why I don't understand. CompleteRSS is only triggered if is_feed() comes back as true.
I'm running it here on WP22, and I'm not seeing this..