Why is the JDBC driver re-arranged?

Hi,

Prior to 6.5, when I ran

$ jar tvf jdbc6.5-1.2.jar

I got

......
  5309 Wed Sep 15 21:45:44 CST 1999 postgresql/Driver.class
......

Now in 7.0, when I ran

$ jar tvf jdbc7.0-1.2.jar

I got

......
  5341 Mon May 15 16:07:48 CST 2000 org/postgresql/Driver.class
......

Is there any particular reason to rearrange postgresql.Driver to be
org.postgresql.Driver?

The system I am using is Red Hat Linux 6.2 with Kernel 2.2.14-6.1.1 on
an i586

Thanks in advance.

Michael