I don't think it's fair to say it impedes....you just gotta learn about the interface and how to use it, just like any other piece of 3D software. I keep hearing about how once learned, the interface is good. Anyway, why are you trying to render the camera viewport in the first place, wouldn't it be better to do a normal render with the popup window box? Go to render output options and the toggle DispWindow (or DispW forgot) button and see if it renders with that. There's other important settings for the window, like window size and format settings.

Edit: I tried to render in a camera viewport just like in your setup in the picture and it works fine for me. There is something screwy about your setup, maybe you enabled something by accident. Which renderer are you using? Built-in or yafray? Try the suggestions I said in my above paragraph, if it that still doesn't work, then maybe it's an issue with your graphics card? http://www.blender3d.org/cms/Graphics_Cards.201.0.html
http://www.blender3d.org/cms/Graphics_Cards.201.0.html#1120

Maybe someone else knows, sorry I can't help much.

Message edited on: 11/28/2004 10:05

Message edited on: 11/28/2004 10:11