bad result. Lots of failed files "ran out of retry's and a lot of files in the chunk dir. downloaded the according nzb and the missing part were downloading
Is pretty much normal. It happens when retries expire and you don't have any PAR files. Just for a test, how about setting the retries to 30 and see what happens? Newsbin isn't saying the files you're downloading are bad. It's saying that it couldn't finish the files before the retries were used up AND there were no PAR files so, it moved them to the failed list. You could move them back into the download list and they'd probably continue downloading too.
Normally when files are posted, the small PAR comes first and then the files and then the rest of the PAR files. If that's the way a file is posted, Newsbin will just keep retrying forever.
On the other hand, many of these new obscure posting formats don't post the PAR files till after the files are posted so, the retry logic is failing the partial downloads.
Increasing the number of retries will make it try alot longer. The downside is that Newsbin uses retries to control when to assemble partial files and repair.
I was just experimenting with this kind of download. I noticed the same thing with files that are posted with delayed PAR files. I might need to give you an option to never remove files from the download list even if the retries expire.