HEAD version of initdb fails on Win32 - Mailing list pgsql-hackers

I get the following error message when I try to do an initdb with CVS 
HEAD on a Win32 platform:

creating configuration files ... ok
creating template1 database in data-head/base/1 ... FATAL:  access 
method "btree" does not support unique indexes
child process was terminated by signal 1

Regards,
Thomas Hallgren