If you are using Astraweb, Giganews, PowerUsenet, Supernews, or Usenet.net, you will need to run 5.59 if you are downloading headers.
Here's the list of changes:
- Fixed issue handling article numbers over 4 billion.
- Tweak for cases where the par16K hash is missing from the beginning of a par2 file
- Includes new par2dll.dll and tbb.dll files. Improves repair performance.
More info and download links are on the Newsbin Download Page.