According to DailyTech, "no less than four" of AMD's board partners advertise UVD support on the box art for their Radeon HD 2900 XT cards. Online retailers, too, seem to have been fooled by AMD's none-too-clear statements regarding UVD support. As The Inquirer reports, online stores like Amazon advertise UVD support in their Radeon HD 2900 XT listings. For instance, Amazon's listing for an HIS model asserts, "HIS Radeon HD 2900XT enables a one-plug big-screen HD gaming experience with ATI Avivo HD video and display technology with advance high definition features including UVD technology."
DailyTech points out that this situation is reminiscent of ATI's troubles with HDCP support last year, before it was bought out by AMD. ATI was the subject of a lawsuit that claimed the firm advertised its cards as HDCP-compliant when many of those cards didn't actually have HDCP support.