so here's the story.

I'm running fedora 4, kde 3.5, everything is pretty well up to date.
Everything ran fine, until I installed a firefox extension called "Email Notifier Toolbar." Once I installed that, I discovered that yum didn't work right, and firefox froze. I uninstalled it, and firefox stopped freezing, but couldn't actually load a page unless konqueror also happened to be accessing the web. That problem turned out to be network.http.pipelining having been turned off, I assume by that new extension. I turned it back on, and firefox worked fine. Yum was still a problem. I installed yumex, and the same thing happened ("Cannot find a valid baseurl for repo..."). I played around with disabling/enabling various repos, and found livna and the fedora repos work fine. But freshrpms and the kde-redhat repos get that error. I reinstalled the freshrpms.repo, kde.repo and kde-redhat.repo files, still no go. Any help would be appreciated.

Can you post the exact output you are getting on the screen. Cheers.

Yup, pretty simple...

Cannot find a valid baseurl for repo: kde-redhat-stable-all
Cannot find a valid baseurl for repo: kde-redhat-stable
Cannot find a valid baseurl for repo: kde-all
Cannot find a valid baseurl for repo: freshrpms
Cannot find a valid baseurl for repo: kde-redhat-stable-all

I've just tried accesing the freshrpms mirrors and they seem to be working fine. Try removing any traces of the problematic repos and then configure them from scratch.

Okay, that was pretty dumb. My freshrpms.repo had the baseurl commented out. That works now. Replaced kde-redhat.repo, got the same error. Noticed there's no baseurl lines in the repo files, so tried adding it. got a slightly different error:

"Cannot open/read repomd.xml file for repository: kde-redhat-stable
failure: repodata/repomd.xml from kde-redhat-stable: [Errno 256] No more mirrors to try."

Thoughts?

Anyone got any ideas here?

okay, I don't really know what I did, but the stupid thing seems to have resolved itself...