I've specifically designed this layout to show my problem.
The layout is 360 wide by 90 high, and I have a platform at 30 high & solid, and a player at 30 high with platform behaviour.
I've snapped the layout to grid 30x30 and I've put the platform at both the top and bottom of the screen, supposedly leaving a 30 high gap in the middle, yes? But will my player fit in there? No he wont.
I cant see any overlap and don't know why he wont fit!
I have the .capx file here - wontfit (grey 'Download This File' button towards the bottom)
Any help much appreciated. I am an utter noob, after all!