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(I'm not going to bug theymos with a PM about this one, so, hopefully he bumps into this post naturally. I didn't test this change very carefully, because that's always the most time-consuming part of the process, and it doesn't make much sense for me to allocate a huge block of time to doing cross-browser testing for a proposed change that theymos might never even see, let alone merge. If he merges it and it turns out that I've overlooked something, like maybe selection-preservation not working exactly how it used to, then the change can be undone and I'll attempt to revise/improve it at that point.)