Dave Jones summarised the problems at
Hope this helps,
I've got kernel.org 184.108.40.206 running fine on a couple of FC3 boxes. No
problems the I've detected, but there's nothing exotic about the
configuration, just a couple of vanilla Dell boxes.
It wouldnt be wise to depend on one user experience to push a new major
kernel release into Fedora especially when it goes into a community
maintained Fedora legacy project.
Fedora Bug Triaging - http://fedoraproject.org/wiki/BugZappers