From the Tartan Army site:
The New Scotland Away Top has been revealed accidentally after it went on sale in an Sports Shop.
Tartan Army Message Board member Bart spotted in it an Edinburgh sport's shop earlier today. It was only available in a child size at the time and was mixed in with the older (diadora) yellow goalie tops. The current goalie top is sky blue.
The shirt is basically a yellow version of the current home top. Yellow front and back, Adidas 3 strips down each arm, Adidas logo on right, SFA logo on right.
The away top wasn't supposed to be available until the 18th August. It's due to be worn against Sweden on the 11th August.