Then he goes on to say that perl 5.8.3 gives a different result from perl 5.6.1 and that this is somehow a strike against Perl's suitability for "enterprise" work. This sounds like a result of the many bugfixes in unicode and regex stuff that happened between those versions to me, but he appears to be saying that the inability to fix bugs in Java is a positive thing, since it means you can get the wrong answer consistently. He also doesn't say whether or not he was using the same versions of Java in each test.
The problem with blog postings like this isn't so much that they are exist as that many people who read them will not have any context for evaluating the validity of the benchmark, and will just start spouting nonsense about Java's regex speed. Very frustrating.