Podcasts failing to download intermittently

[k4nz4k1g4w4]

Recently I've noticed that 2 non-consecutive podcasts haven't downloaded properly and haven't even shown up in my iTunes: the one on Kansaiben was one of them. Can't remember the other one. Anyone else experiencing this?

[schenkus]

Recently I have the same problem, currently I can't see the 擬音語17 lesson and the upper intermediate S3 17.

I'm following the podcast for more than a year now, and I didn't notice this problem until recently.