up2date broken

[John Aldrich]

I think I broke my sources file for up2date. For some reason the RHN applet 
tells me I have a bunch of updates to download, but when I run up2date, it 
now says that everything is updated and I don't have any new files to update. 
How do I fix this? I was trying to add a secondary mirror because the main 
mirror kept giving me 404 errors trying to update (I know... if I wait 24 
hours, I'll be able to download the updates, I just wasn't being patient! 
<G>) and must have screwed up the config or something...
 Thanks
 John