Custom date fields are not searched on properly

This phenomenon was first reported by swettling today, and I discovered the same this evening:

http://forum.civicrm.org/index.php/topic,15470.0.html

I am trying to run an advanced search on my contacts, filtering on a DATE custom field, "expiration date".
The search I am doing is for all contacts where the date is greater than today, which is 9/1/2010.
When I do this, it returns some results, but they are in correct, as the returned search criteria reads:

"Expiration Date >= January 20th, 9"

It should read: "Expiration Date >= September 1st, 2010"

It seems to be misinterpreting dates in custom data types.

You can view a screencast here:

http://screencast.com/t/MzQ5ZmIyM