In the same build that our self extracting archives for Solaris went
from installing in j2sdk1.5.0 to jdk1.5.0, the installation of
.systemPrefs went from

j2sdk1.5.0/jre/.systemPrefs
to
jdk1.5.0/.systemPrefs

This is a regression of an earlier, customer reported, bug, 4882241,
fixed in Tiger b22.

I've noticed this regression in the linux jdk .bin bundles as well,
occuring in tiger b50 as well, when the rename happened.

The Solaris SUNWj5* packages are not effected since they have
a separate process for installing .systemPrefs

Not sure if it's applicable to RPMs.