We've been using Filemaker 10.0v3 in WIndows XP, SP3 since the week the updater was released. We have encountered no issues specific to Windows XP and this update.
I do have WinXP Pro SP3, so I may take the plunge (another water metaphor; sorry).
Do you (or does anyone else) recollect anything like what I described? Maybe I dreamed it(?).
Nothing comes to mind specific to that update.