scripting changed in 5.4?

My configuration scripts (that I use to load a standard configuration)that were running fine in 5.2 (and for a long time before) are failing at multiple points in 5.4… Before I get down to the nuts and bolts of it, has something more material changed with the OS that I should understand ?

You may find helpful info about some of the changes in this thread: http://forum.mikrotik.com/t/ros-5-x-release-notes/48512/1