Ok, I will log this as a bug to have it corrected in the next update, in the mean time if you set the first field of the search page to be a text field, does that allow you to use a date picker for fields under it?
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.