as many have discovered, when you try and run ubuntu 12.04 headless and then vnc into the desktop, you get a small window-640x480. This post beautifully outlines how to fix that.
I used the xorg.xonf file in post 5 and got my bigger window into ubuntu from a windows vnc client. But I also got this:

Why is it trying all those modes?
And how can I stop precise pangolin from its OCD behavior?