Sometimes (more often than not) when I click the green Select button, it clicks but does not go into the mission. I played the first mission and can't get into the second one. It just stays at the selection graphics.
Windows 7 64 bit
8 gigs ram
core i7 3.2
blah blah blah...
Shoot, I should have put this in the Tech section, I'm sorry about that.
There is a bug where if you have loaded during a mission, then win that mission, you cannot then select and run the following mission. This can be worked around by simply exiting the game, re-running, and going to the next mission. This has been fixed for the next update.