[Rails-core] Sybase adapter association dates

[John Sheets]

I'm trying to clean up my Sybase adapter patch
(http://dev.rubyonrails.org/ticket/3765) and I keep tripping over a
puzzling hurdle.  I can get all the unit tests to pass in stable and (with
a few minor tweaks) in trunk, but in both cases I have to special-case the
date assert in associations_test.rb for the following methods:

  test_additional_columns_from_join_table
  test_habtm_adding_before_save_with_join_attributes
  test_rich_association

In each case, the joined_on field comes back as a String, not a Date.  Can
anyone give me a hint what might be causing this?  I'd really like to
remove the special-casing if I can.

Thanks,
John