This release has a compiler-bug workaround for Sun C 5.9 identified by Andy Armstrong. No, really, it was a compiler bug: http://in.opensolaris.org/jive/thread.jspa?threadID=53641&tstart=0
You don't need to upgrade if you already have 1.05.
Changes for version 1.05_02 - 2008-04-20
This is a workaround for a Solaris compiler bug, but let's see what CPAN Testers does with it.
Changes for version 1.05_01 - 2007-11-20
Updated rijndael.h to handle Mac OS X Panther, thanks to John Fong.
No need to upgrade if you already have this installed.