This new post on the Zend Developer Zone (from Ralph Schindler) is announcing this month's Zend Framework Bug Hunt Days starting today (the 26th) and running through Saturday (the 28th).
For those who haven't put the reoccurring event in their calendar, this announcement is for you: Zend Framework Monthly Bug-hunt is here again! Tomorrow, Friday and Saturday of May (the 26th, 27th and 28th 2011), 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.
He mentions last month's winner, Adam Lundrigan, and some hints on how to get started (including a few screenshots on helping you find issues to work on). See the rest of the post for complete information.