While I would never assume that Kees had anything but the best intentions when posting a duplicate to the Fedora issue tracker, its advisable to read over the timing of comments in the launchpad bug to get a feel for what's going on.
2010-03-21 : Launchpad bug filed
2010-04-14 : Comment from Ted Ts'o https://bugs.launchpad.net/ubuntu/+source/linux/+bug/5436...
2010-05-04 20:36:58 kernel and Fedora bug filed.
I would dare say that Ted's comment actually sort of encouraged, indirectly, Kees to do the additional posting in the hopes of getting Red Hat engineering resources interested in solving the problem on a mutually beneficial timescale.
Though I do sort of have to wonder why it took 3 weeks after Ted Ts'o to confirm it was happening with an upstream kernel for the upstream kernel report to be filed...and only after the Ubuntu specific workaround was found to be insufficient.