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 OS X. 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 5m 8s ago
Set choice of various number tags of selected tracks incrementally
downloaded 10m 43s ago
Sort purchased tracks into discrete playlists by name or Apple ID
downloaded 22m 10s ago
Title Cap various track tags, featuring editable exceptions lists
downloaded 34m 34s ago
Batch-change the Album Rating for the albums of selected tracks
downloaded 37m 0s ago
Use tag data to formulate new file name for selected tracks' files
downloaded 39m 33s ago
Convert selected tracks and export the converted files to a new folder