One more bug I forgot to mention to you is that when you export in the skp/dwf format from Artlantis the jpg (or else) textures applied onto the object get mirrored in the final skp/dwf output. To reproduce this bug upload any atlo file into Artlantis with an image file applied onto it (ideally with some writing (as is the case with street banners) and then re-import the skp/dwf output into Artlantis! You'll notice that the images are now mirrored!
P.S. But when you export as obj the textures are not mirrored if you imported the obj file back into Artlantis!
Hope this helps,