Hi Fimlys,
the weird thing is FeedBurner is working fine for other podcasts. I'll just try again and maybe I'll get the podcast in there another way.
Sadly I am not savy enough debugging the Nokia that I could provide any more error information.
I was able to download the podcast with a webbrowser from the link provicded with the feed.
I looked around the web and there are a few hints here and there that Canola sometimes has problems with Feedburner but most of it is very vague. Just like my post here

Thanks for your offer of help. I'll try to find out more myself ...
Bye
Yashima