There is an issue in Fedora 11 with the use of hardware sensors. It has been explained excellently in this blog post:
by Hans de Goede. His text could be used more or less unchanged for a release note. This issue should be added to the Fedora 11 release notes.
This is noted in section 5.2 in the release notes, along with a link to bug 496355 which explains this in much more detail. (rev 1.6)
This was fixed in fedora-release-notes-11.0.1-2 which was never pushed. It will be pushed with fedora-release-notes-11.0.4-1