migrating / upgrading to new version

Howdy:

Running PostgreSQL 7.2.1 on RedHat Linux 7.2.

I'm about to upgrade / migrate to PostgreSQL 7.3.2 shortly
(let's say this weekend).

Are there any gotchas or caveats that I need to know?
I'm particularly concerned about doing a pg_dump of
the database and not being able to load it into the
new version because of some incompatibility.

Comments?

Thanks!

-X