Bus error on make check

I get the following errors upon running a make check for 8.1.3:

./pg_regress: line 503:  9002 Bus error               "$bindir/psql" - 
X $psql_options postgres /dev/null
./pg_regress: line 503:  9007 Bus error               "$bindir/psql" - 
X $psql_options postgres /dev/null
./pg_regress: line 503:  9012 Bus error               "$bindir/psql" - 
X $psql_options postgres /dev/null
running on port 55432 with pid 8714
============== creating database "regression"         ==============
./pg_regress: line 541:  9019 Bus error               "$bindir/ 
createdb" $encoding_opt $psql_options --template template0 "$dbname"
pg_regress: createdb failed
make[2]: *** [check] Error 2
make[1]: *** [check] Error 2
make: *** [check] Error 2

Any ideas what could cause this?

Thanks,
Doug