I consider Blue Jeans cable to be a reliable source of information and high quality cables. According to them the HDMI Version 1.0 cable is fully compliant with HDMI 1.4 but may not be high speed cable. There is some difference in the cable as far as speed but over short runs it may work as long as it is not defective and you don't require Ethernet. To Gonks point, a long run over HDMI does present problems. Can you test the projector with a short HDMI cable to verify it is the long run giving you problems? When I construct my HT room I plan on eliminating the long run issues because I see 4K coming down the road.

See this link to BJC:

http://bluejeanscable.com/articles/hdmi-1-4-cable.htm?hdmiinfo