I've noticed that out of no where it has become impossible for me to listen to any podcast on Chrome/Firefox/IE with my desktop PC. I thought it might of been site slowness when I first had the problems but now I think it has something to do with my PC. I use the mobile site on Chrome with my phone and everything works great but whenever I try on my computer it just has the spinning cassette going forever. Any clues?
If it's happening with every browser, I'd suspect that there might be something funky with your Java installation or some other third-party thing. Maybe run a general Windows Update, download and install the latest Java stuff, and reboot and see if it persists? Or just download the files, either manually or via an RSS feed, and listen to them that way.