So I've found a solution for this issue with the Short / Long / Short blinking sequence (aka "Make sure you are using the correct power adapter with the display").
I've found the solution on youtube: http://www.youtube.com/watch?v=aH5xgo1u3Ks
Basically, all you have to do is isolate the middle pins of the symmetric proprietary connector on the power adapter, using scotch tape. I just did it, it worked. Just make sure the pieces of scotch tape are really narrow and cover both middle pins and only these.