I've had this error
[21:53:13] ERROR AW alt.binaries.boneless Header Download Failed: ReadFailure
A few times when upgrading from 6.56 to 6.60 beta 15. I've used two different backups of headers each batch of headers have updated successfully when tested with 6.56. The error occurs after all header updates have been downloaded and only on the last group being processed by NB. I use the verbose logging so I'm not sure if anybody else that downloads headers necessarily sees this error message. The lines that appear before the fail message are the standard compress=gzip for each group being processed before it reaches the last group and is the last line in the log, the group name changes depending on the last group those headers were downloaded.
As a side note there's still a memory leak when loading headers, I tested it with loading all headers from a.b.warez and a.b.boneless, in most cases NB's memory usage matched what was reported in task manager in one out three times the system would report 10GB more memory usage than NB was reporting once all the headers were loaded and accessible. The tests in this case were done with NB running with firefox, antivirus (with exceptions for the Drive containing NB plus configurations in place), and a firewall running.
Has anyone else experienced these problems?