What is the difference between firebirdsql.jar & firebirdsql.rar?

I saw something in the html release notes and it does not mention it.
However it does say something about a jdbc 2.0 and 3.0 driver.

Are there two, and how can you tell which one is which.

Thanks

--
Sincerely,
William L. Thomson Jr.
Support Group
Obsidian-Studios Inc.
439 Amber Way
Petaluma, Ca. 94952
Phone 707.766.9509
Fax 707.766.8989
http://www.obsidian-studios.com