Not sure if this has been said, but...
When I set the depth of 3D-box to a value less than 1, it doesn't work in the layout editor, it's just flat, like it was 0. But when I set the depth-value in Event Sheet (Start of layout for example) to something less than 1, like 0.5, it works. Also values like 1.2 or 1.9 etc. don't work in the layout editor, only "whole" numbers like 1,2,3,4 etc. work.
Same with Z it seems.
Yes, yes it is. Test confirmed that.
Also, further thinking gets me to a conclusion that this post should not be here.
Ok, sent it to Sourceforges bug-tracker.