I'm on version 6.50 beta 8, and have looked at the changelogs up until the latest version, but haven't noticed anything related to this, so am thinking it's still an issue.
There are plenty of files which are split not by RAR, but like how HJSplit does it, ie. .001, .002, etc. Essentially, they split the files as is, without compression or modification. I usually use QuickPAR to join them up again.
This is something Newsbin used to be able to do automatically though, why does it not work anymore? It ends up unnecessarily downloading all the PAR files as well because of this. Auto UnRAR is enabled, and that works out fine, I don't see any other relevant option available either.
Thanks.