I suspect this is a Linux/WINE specific issue but 6.6B4 will not unrar.
If I right click on a completed download and go to AutoPAR, UnRAR / Join files, then the Window just pops open briefly and disappears. If I click the "Unrar and try to display rar contents" icon however it DOES Unrar but obviously to the wrong directory.
If I manually unrar on native Linux of course everything is fine also.
I understand Linux is not officially supported but I have been using Newsbin exclusively on WINE for years now and the main functionality has always worked fine. Hopefully this is a minor glitch that can be fixed.