It depends on the issue, this is designed only to fix whitespace issues. It will not fix the extra character in feed errors. If you post the feed link I can take a look at it for you.
hi i have same issue didnt work with my link: http://www.radioreformaseoye.com/feed
I see the whitespace in the beginning of your feed, did you go to tools->RSS Fix and apply the patch? It will not work until you do so.
woh now its working was a combination of a bad plugin also, thank you sir
Glad to hear it. Could you post the name of the plugin causing the issue for others in case they are experiencing the same issue? Thank you.
