When going thru http://www.jetbrains.net/confluence/display/MPS/GettingStartedWith+MPS
there is a spot in the sequence where the navigation when working on one of the editors is broken. It jumps ahead too far and you have to backtrack to finish filling something in.
See attachements 1,2,3,4.
Between step 1 and 2 it jumps ahead too far, 2 -> 3 is my backtrack so I can finish the skipped field.