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 15s ago
Create two playlists containing tracks with JPEG and PNG artwork
downloaded 8m 1s ago
Swap the name with the artist of selected tracks
downloaded 9m 12s ago
Apply selected CD's CD Text to its disc and track tags
downloaded 14m 52s ago
Correct song titles listed as "Artist - Song Name"
downloaded 51m 35s ago
Gather audio tracks whose files contain no artwork metadata
downloaded 53m 10s ago
Restore each selected track's artwork from an image file stored in its Album folder