I've seen this problem occasionally. It has to do with strange characters in the NNTPFrom header field. Once the batch is downloaded part of the processing is to parse this 'from' header to extract the email and real name. If there is something it doesn't like in here it can take forever to process. I've seen it take 10 minutes before. It does come back eventually though. This is very rare but I will try to determine exactly which characters it has trouble with.

Which newsgroup is it stopping on. I'll try the same one for testing. Try just letting it run for a while to see if it frees up.

regards