In order to pick up retroactive changes to our P4 repository, sometimes we completely reindex our one of our p4 repositories.

When we do this, all RSS feeds (at least for those using Thunderbird as an RSS reader) "reset" back to their original state, and we end up with entries in our readers for things that we've already seen.

The reason why we care about this is that because people go in and "fix" changelist descriptions and JIRA linkage after initial submission, we'd like to start automatically reindexing our major repositories every day, but that would cause so much RSS chaos that we'd not do it.

I've had reports that those using Opera aren't affected by this, so it might be some Thunderbird/Firefox/RSS issue.