Massive regression failures

I am seeing massive regression failures on a freshly compiled, initdb'ed
version of CVS:
16 of 81 tests failed, 1 of these failures ignored. 

The first failure I see is:  COPY COPY_TBL FROM
'/usr/var/local/src/gen/pgsql/CURRENT/pgsql/src/test/regress/data/constrf.data';-ERROR:  copy: line 2, CopyFrom:
rejecteddue to CHECK constraint copy_con  SELECT * FROM COPY_TBL;   x |       y       | z ! ---+---------------+---!  4
|!check failed | 5!  6 | OK            | 4! (2 rows)
 

Are others seeing this?  Cause?

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