The Zend Developer Zone has a new post about this month's Zend Framework Bug Hunt Days happening today (the 22nd), 23rd and 24th:

For those who haven't put the recurring event in their calendar, the Zend Framework Monthly Bug-hunt is here again! This Thursday, Friday and Saturday (the 22nd, 23rd and 24th of September), we'll be hosting our monthly bug hunt. For those of you unfamiliar with the event, each month, we organize the community to help reduce the number of open issues reported against the framework.

Included in the post are instructions on how to find issues in their new Jira configuration (unresolved issues), where you can go to get involved - including the zftalk.dev IRC channel and their "Getting Started" guide.