6.5 indexes on timestamp/abstime don't appear to work

Your name		:	Jim Mercer
Your email address	: jim@reptiles.org


System Configuration
---------------------
  Architecture (example: Intel Pentium)  	: Intel Pentium

  Operating System (example: Linux 2.0.26 ELF) 	: FreeBSD 2.2.8

  PostgreSQL version (example: PostgreSQL-6.5)  :   PostgreSQL-6.5beta1

  Compiler used (example:  gcc 2.8.0)		: gcc


Please enter a FULL description of your problem:
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CREATE TABLE foo
(
  mark     abstime;
  subnet   inet;
  bytes_in float8;
  bytes_out float8;
);

CREATE INDEX foo_by_time ON foo (mark);
CREATE INDEX foo_by_subnet ON foo (subnet);

queries don't use foo_by_time


Please describe a way to repeat the problem.   Please try to provide a
concise reproducible example, if at all possible: 
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as above.

If you know how this problem might be fixed, list the solution below:
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