I got a nice little present for Christmas.
It had +4 lines, a huge mail explaining why and made me feel happy & stupid at the same time (there's some correlation, I think).
The patch fixes a one-off error in the APC shm allocator (read my mail for a shorter paraphrasing) and has triggered the 3.0.16 release. Now, APC should be stable even when running under cache full/heavy load conditions. And I've been barking up the wrong tree of race conditions for months & months. But the important thing is that this is fixed now.
Merry XMas and a happy New Year! [ citation needed ]--
Patience is a minor form of despair, disguised as virtue.
-- Ambrose Bierce