Obligatory warning: This script has been designated as an obsoleted "Retro Script". There is no guarantee that it will function as described with modern versions of iTunes and/or macOS. If used in its current form it may not work at all without modification and, at worst, it may corrupt or destroy data.
iTunes will stop updating a podcast if you have not listened to at least one of its episodes in five days. This script will batch-update every podcast subscription so you don't have to manually update each one individually.
I have posted instructions on how to create a launchd agent to run this script automatically and invisibly in the background to ensure that your Podcasts are always updated.
Possible iTunes bug (July 17, 2014): Looks like the iTunes AppleScript command updatePodcast command is broken as of iTunes 11.
downloaded 3m 31s ago
Convert selected tracks and export the converted files to a new folder
downloaded 7m 38s ago
Change file type to make selected AACs bookmarkable
downloaded 13m 30s ago
Batch set new Last Played/Last Skipped of selected tracks
downloaded 13m 35s ago
Batch-reset the Start and Stop Time of selected tracks to their entire duration
downloaded 22m 35s ago
Title Cap various track tags, featuring editable exceptions lists
downloaded 35m 59s ago
Remove iTunes tracks disassociated from files