This is bug #6139143.
iTunes’ “Podcast information” window doesn’t accept scrollwheel or two finger trackpad scroll input.
STEPS TO REPRODUCE
- Open the “Podcast Information” window (note that there’s no menu item for it, too)
- Select a podcast with a long enough blurb so that the scroll bar appears
- Try and scroll the text with the trackpad or with a scroll wheel
While we’re on the subject, what’s with that weird window re-size widget?