It is always important to know how to submit a bug report. It doesn't help that every community has different expectations, and every bug tracking system has a different layout. In Squeak, the learning curve is long but shallow.
In this 23 minute screencast, Ken Causey starts with some bug hunting tips, and explains how to make a Smalltalk changeset file that is numbered, documented and compressed. He then shows how to submit this to the Mantis server on bugs.squeak.org.