By the developers own admission iPodderX 3.0 is in need of more bug fixes than could possibly be listed here, or on their own support forum which is ablaze with angry and frustrated users.

iPodderX 2.9 worked well, with a few rough edges, but it was reliable and intuitive. 3.0 is slow, counterintuitive unstable, buggy . . . . .

iPodderX Lite 2.9 is still available on VersionTracker, but has been removed from ipodderx.com. If you need a simple podcasting client that works, iPodderX Lite 2.9 is the way to go, and its freeware.

I don't think it is a coincidence that 3.0 was released on the same day that Job's announced that iTunes would have a podcasting client in its next update.