In the past two weeks a great deal of effort was put by a number of developers towards stabilization of the 5.1 branch with over 20 bug fixes made during this period alone. Based on our own tests (those wacky phpt files) and those made by QA team and related projects, 5.1 is ready for production. Pending discovery of any critical issues such as crashes, security faults and regressions I intend to release 5.1 final no later then November 10th.
In the meantime I'd like to ask all PHP users to test their code against PHP 5.1 to ensure that no critical issues have been missed. Our own testing methodology while quite extensive does not cover all areas of the code and your help is needed to located any non-yet discovered defects. If you (I hope that you won't) do discover any issues please report them via http://bugs.php.net.
Do the folks who control what goes into Fedora Core releases know about 5.1? They are currently listing 5.0.5 as the one to go into Fedora Core 5, despite the fact that they're not adverse to putting development releases in.
Perhaps the fact that 5.1 isn't mentioned on php.net may have caused them to overlook it?