sentences:  The Professional/Watercolor theme was never meant to be the final theme for Whistler, in fact it has been stated that Microsoft used Watercolor as a decoy, until they were ready to show Luna.Build 2257 featured further refinements to the Watercolor theme, along with the official introduction of the two-column Start menu, and the addition of an early version of Windows Firewall.Microsoft released Whistler Beta 1, build 2296, on October 31, 2000.