Apologies if this is not the way you report bugs, but i'm not aware of any formal bug tracking.
This bug has always been in PSP. for as long as i can remember. but in previous versions it just sent it bananas. in this version it can cause a full crash and lock up.
If you have no layer below the one currently selected, for example you only have one raster layer (put something in this layer suitable for drop shadow,) and you select 3D effects -> drop shadow with 'shadow on new layer' selected every time you adjust one of the shadow parameters it creates a new layer. so you can end up with dozens of new layers. seems like part of the routine is to renew the process everytime a parameter is adjusted but the logic that removes the layer doesn't work when the source is at the bottom.
new to X4 is that if my system is under high cpu utilization it just completely crashes. probably the method by which it allocates the new memory to new layers is timing out.
