From Janis Kracht@1:2320/100 to All on Tue Mar 22 23:50:34 2011
What's new in V4:
1. RAR decompression speed is improved. Depending on data type,
decompression can be up to 30% faster than in previous versions.
Both the general RAR algorithm and most of special RAR multimedia
methods benefit from this improvement. The only module of RAR
algorithm, which is not affected, is "Text compression" method.
2. Changes in -x<file> switch syntax. Now you can specify a wildcard
exclusion mask for folders. Such mask must have the trailing '\'
character, like -x*tmp*\ or -x*\temp\
3. Recovery volume processing involves less disk seek operations
resulting in higher performance.
4. New error code 10 ("no files") is added to list of error codes.
This new code can be returned by archive, extract, delete
and repair commands. It means that RAR did not find any files
matched the specified file or archive mask.