Did you do a file verify after the public preview update?
Did you try rebooting your laptop also.
The map file you sent me loads up in my public preview with no errors.
It also plays in test game. A few scripts you have that I dont, but working here.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.