There is a newer tarball on the jasspa site, md5 is not the same as the tarball in the distfiles, it fixes an actual compile issue I was about to report with the older tarball. For more information: http://groups.yahoo.com/group/jasspa/message/1368 That's the compile error I'm getting from it with GCC-4 and USE=-X.
Committed new version (20050505-r2). If you have the last "version" in /usr/portage/distfiles, you need to delete it.