Description of problem: Recovery alerts actually create an additional alert, plus they don't clear the old alert. I created a custom alert sender that basically acknowledges the recovery alert with a fixed subject. I'm thinking of an addition to clean up the old alert(s) as well. This is a placeholder for the feature I'm going to contribute.
Elias, my patch to the issue 1003211 solves the same issue (it marks the previous alert recovered + adds filtering options).
Michael, Bug 1003211 -- Looking at the patch, yours is a better fix, though I'm kind of happy with my plugin since it doesn't require having to upgrade my server or schema, and it's fairly simple (like 100 lines of code.)
Closed because of merging of BZ 1003211. *** This bug has been marked as a duplicate of bug 1003211 ***