The Zend Developer Zone has announced the start of October's Bug Hunt Day for the Zend Framework:

As reported last month, Zend Framework has started hosting a monthly "bug hunt": an effort to resolve issues against the framework. This month's bug hunt is today and tomorrow. The individual who helps resolve or assist in resolving the most issues during each month's bug hunt days will receive a Zend Framework t-shirt! Last month's winner was Padraic Brady.

Matthew includes a few reasons to help out - helping ZF helps you (and your projects), adding value to the framework and the development of good QA skills for creating unit tests and documentation. If you'd like more information on how to participate, check out this page of the Zend Framework wiki or just come over to Freenode's #zftalk.dev IRC channel and get involved!