Redhat 7.3 time manipulation bug

Hi, 

Something is pretty broken in redhat 7.3 but I'm not sure what and I
don't have time to dig further

masm@test=# select cast('1967-04-18' as timestamptz);
      timestamptz
------------------------
 1967-04-17 18:00:00-06
(1 row)

masm@test=# select cast(cast('1967-04-18' as date) as timestamp);
ERROR:  Unable to convert date to tm
masm@test=#

Both cases works correctly in Redhat 7.2. Sorry if this is not the
correct forum however an alert is nice for people planning an Redhat
upgrade. I hope to see pretty soon an update since I don't want to
downgrade my server.

Regards,
Manuel.