please have a look at the "Site Administration" -> "Modules" -> "Activities" -> "Manage activities".
There you will find an entry "Feedback". In the column "Version" you can see the version of the feedback-module.
Hi, I'm working with moodle 1.9 (20080306) and mysql 5.0.19 php 4.3.9 OS is linux (don't know the version) We are going to do maintanance in a short time, so we are going to upgrade all things on our server.