WordPress MU

Hi!

I've got big problem.

I can't add rss widgets to sidebar of main site of my WPMU. When I save changes, my sidebar is empty - list of topic from rss feed doesn't show.

Why?

what's the url?

...of the RSS feed that you;re trying to add and the site you're doing this on so we can see what the result is please?

RSS that I trying to add is, for example, http://wiadomosci.onet.pl/16,kategoria.rss

Last time I knew, the comma wasn't allowed within a URL but the issue is the feed does not validate:

http://feedvalidator.org/check.cgi?url=http%3A%2F%2Fwiadomosci.onet.pl%2F16%2Ckategoria.rss

I tried to add validate rss but it doesm't work.

I don't know what is going on.

I tried to add validate rss but it doesm't work.

And that URL would be?

for example - http://mu.wordpress.org/forums/rss.php?topic=5856

Are you getting anything in the error log?

When you bring up the rss widget for editing afterwards, is the URL in there or is there an error?

I just tried that RSS URL and it worked fine on a test WPMU setup. Can you walk us through what you're doing with specifics please.

I'will install WPMU again. Maby after that, everething will work fine.