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 8m 28s ago
Exports and then re-imports selected tracks' artwork
downloaded 12m 34s ago
Exports your choice of title, artist, album, time, and size of the selected tracks to the clipboard or a text file
downloaded 13m 22s ago
Copy Artist to Album Artist of selected tracks
downloaded 13m 25s ago
Correct song titles listed as "Artist - Song Name"
downloaded 17m 16s ago
Removes leading and trailing space characters from chosen tags in selected tracks
downloaded 22m 59s ago
Display/export a text file list of chosen tag data in library or playlist