exposed numerical filters truncate to integer

I've got a view with an exposed filter on a decimal cck field. If I enter 2.9 in the form, it treats it as if I entered 2.0.

For example:
- http://www.ssrealty.com/buyers
- Enter 2.9 in the Min Land Area field, and Apply.
- You'll see a bunch of items in the table with a Land Area of 2.0 acres.

The error is apparent in the generated sql (from the views admin page):

SELECT node.nid AS nid, ...
WHERE ... AND (node_data_field_land_area.field_land_area_value >= 2)
ORDER BY ...