OK. Thanks guys. The other guy who is joining me in bitching about this says he has tried it on 5 totally (as in old, new, different OSs etc) different machines, and had the same trouble with every one. If I could.... I use Director's View. This is where the trouble seems worse. I was told (by Brycetech no less. The dragon stirs in its realm)that the Zoom controls were not meant for the Director's View....mmmmOK. I use an NVidia 5200 card. Win XP SP2. Intel Celeron 2.4. Bryce is set up at 1024*768 as is the screen. To try to repeat the problem, place a cube on screen, on ground default spot. Move it to TLHC of screen by dragging the cube. Pan the image to make it central again. Now "+" zoom in. For me, quite often_ it moves off the top of the screen, instead of straight toward me. If it does behave, try moving it again, and again zooming, as you might in a normal session. Then if I "-" zoom out, it will sometimes get worse, or zigzag. If I zoom way out, then ctrl-spacebar and drag a marquee just around the object, it simply disappears. Sometimes it almost seesm that zooming out "-" "remembers" previous positions, rather than zooming back down the path. Unfortunately these positions are false, or take account of the object's drag movements, but not the pan or..... I actually get some problems with the "camera controls" as well. This has been an ongoing problem for me, and apparently quite a few others. If anybody can describe their setup, and/or try my "recipe"....