Via /. it appears that "Jani Taskinen, one of the lead developers of the Zend Engine (the engine that powers PHP)" has left due to some political reasons in the community. Check out this message:

Thank you all for the last 6 years or so. It has been fun (sometimes) and many times not so much fun. Unfortunately I have had enough and I don't want to be associated with this project anymore.

I'm sure most people (the ones who matter) can understand why. If someone doesn't, I could not care less. Take care.

Please do not reply to this email.

--Jani

p.s. Delete my CVS account. I have no use for it anymore.

Now that is harsh, very harsh. To give six years of your life, and to feel that your contributions were not noted, well - that would explain such an email. I am sure it is deeper then this.