I have 12 podcasts that I listen to, I've subscribe to most of them via the iTunes subscribe button on their websites. This is awesome if your new to podcasts and use iTunes.

One thing that i've just started to notice is that sometimes it takes forever for iTunes to recognise that there is a new podcast available. Why does this happen? I don't think it's my ISP cacheing the RSS feed as my feed reader seems to update new items in the feeds almost instantly.

 Does anyone know why this happens? If you do leave a comment below.