Am not sure if it is a bug of pakset ¿?
(http://img199.imageshack.us/img199/4412/iij2.jpg)
The slope behind is not as steep as the slope in front? Looks more like a program bug.
Both of these are steep grades.
The problem is, that any steeper front slope than 16 is thinner than the graphics behind. It is most visible with 16/32, but will happen with softer slopes (like 12/24) too.
the bug in the first post should be fixed in r6992, the other bugs are the same as in
http://forum.simutrans.com/index.php?topic=12960.0
EDIT: Ok, I saw what was wrong. Thank you for the fix!