I experience the same issue that Archeia Posted...
Also, if you're on a star tile and move to non-star, it clips right away...
Also, since it only takes effect when the sprite is higher than 1 tile, it will not work for when your normal sprite is on a O tile with a star tile above, when in fact the sprite has 4 pixels on the star tile due to the y-shifting for non ! sheets
I have a fix for the last two issues, but I've yet to find out why the first issue happens, possibly the Character becomes a "Star" tile???