upgrading from 9.3-beta1 to 9.3-beta2 requires dump & reload?

Greetings,
I just got around to upgrading from 9.3-beta1 to 9.3-beta2, and was
surprised to see that the server was refusing to start. In the log,
I'm seeing:

2013-07-24 13:41:47 PDT [7083]: [1-1] db=,user= FATAL: database files
are incompatible with server
2013-07-24 13:41:47 PDT [7083]: [2-1] db=,user= DETAIL: The database
cluster was initialized with CATALOG_VERSION_NO 201305061, but the
server was compiled with CATALOG_VERSION_NO 201306121.
2013-07-24 13:41:47 PDT [7083]: [3-1] db=,user= HINT: It looks like
you need to initdb.

I'm using the RPMs from yum.postgresql.org on RHEL6. Is this
expected, intentional behavior? Do I really need to dump & reload to
upgrade between beta releases of 9.3, or is there some more efficient
way?

thanks