It becomes kind of a matter of semantics. Simply put, we update 'stable' Fedora releases to the latest stable upstream kernel, we no longer leave them on the kernel branch they were on when they were released. F16, F17 and F18 are all on kernel 3.6.5 right now.
Originally Posted by chithanh
We do the same for Firefox too, we follow the upstream releases. It's not feasible to do anything else, really. F16, F17 and F18 all have Firefox 16. We don't officially package Chrom(e/ium), so that's not a problem.