Jani Taskinen, one of the lead developers of the Zend Engine (the engine that powers PHP), as well as a lead developer for the thread safety system and other core components of the PHP project, has quit in a relatively cryptic message to the php-internals mailing list. Jani has been involved with PHP for about 6 years and his loss will undoubtedly be a big blow for the PHP project.
The text of that email message is here: "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."
I don't know if this is real or not but Digg has a comment that might show the reason