Horology Test Case Fails with Sun Compiler

After building Postgres 8.0.3, Solaris 8, Sun compiler v 5.7,
I get the following diff with the horology test case:

       | @ 3 mons                      | @ 3 mons
       | @ 14 secs ago                 | @ 14 secs ago
       | @ 1 day 2 hours 3 mins 4 secs | @ 1 day 2 hours 3 mins 4 secs
!      | @ 6 years                     | @ 6 years
       | @ 5 mons                      | @ 5 mons
       | @ 5 mons 12 hours             | @ 5 mons 12 hours
  (10 rows)
--- 2356,2362 ----
       | @ 3 mons                      | @ 3 mons
       | @ 14 secs ago                 | @ 14 secs ago
       | @ 1 day 2 hours 3 mins 4 secs | @ 1 day 2 hours 3 mins 4 secs
!      | @ 6 years                     | @ 5 years 12 mons 5 days 6
hours
       | @ 5 mons                      | @ 5 mons
       | @ 5 mons 12 hours             | @ 5 mons 12 hours
  (10 rows)

This is the only failure in the test suite. Any ideas how
to fix this issue?

Thanks,
Match