The build number for the final version of SP3 is
5512.
Nick MacKechnie: Windows XP SP3 has been released to manufacturing as of April 21st (US Time) with the release to web planned for April 29th (US Time). The detailed schedule by channel is below.
Winbeta also reports that Nick MacKechnie's blog post was removed later during the day. Nevertheless, the release schedule from his blog post can be found below.
Windows XP SP3 - detailed by channel schedule, planned dates (US)
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