Thanks for your feedback [:)]

Ceciliabr, I already noticed the difference between the requested amount of max memory and the actual value reported in the About dialog box.
It's not a bug, but Java probably rather uses the difference for internal management (see this technical article if you want to learn why).

digitaltrails, fortunately you had the idea to test [font=courier new]com.eteks.sweethome3d.j3d.useOffScreen3DView[/font].
It's probably another solution that I should better document, just because I keep in mind to test it from time to time to check if it still works.

bdfd, the behavior you noticed is normal. As said in a previous post:

As soon as an object is deformed, its size can be changed only proportionally, otherwise this could lead to strange shapes.
If ever you need a wider or deeper or higher object, first reset its shape, change the dimensions you want, and deform again its shape.