[NL4] Sometimes can't download a file

[thany]

I sometimes can't download a file. It appears to happen especially with files that have been in a set that's been downloaded and I need to re-download a few of them. NL downloads them, but never saves to disk. In the "!! newsleecher temporary !!" directory, there will be an inaccessible file that coincidentally has the same size as the file I'm trying to download, so it appears to me that NL never finished its download.

It's even reproducible. I can re-download the file over and over again, but it will never be saved. I can even restart NL and it still won't be downloaded. I have to manually delete the "!! newsleecher temporary !!" directory in order to get one friggin file to download.

Other downloads work normally.

Also, this is not specific to my internet connection, my ISP, my usenet provider, or the post. It's clearly a NL problem.

Please fix. It's very frustrating to waste bandwidth and time over something as trivial as downloading a file.
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Running (trying actually) Newsleecher 5.0 on Windows 7 x64