Comment 14 for bug 708957

Right, that would explain why the new alsa-backports package wasn't pulled in automatically after it was released.
Note that this is only an issue if the kernel ABI changes. So updating 2.6.32-33 shouldn't cause any issues, but when installing 2.6.32-34 make sure that the new alsa-backports package is available as well.

Now that you know the reason for this issue: if you notice any significant, reoccuring delays - don't hesitate to open a bug about it. Maybe there's a way to improve the workflow and/or packaging.