Changing the background in Vista Home Basic, build 6000, is doing nothing. I've tried with the latest version and 120. It works as expected on my XP machine. In Vista the text area is filled with 'white' or whatever white happens to be mapped to in the colours dialog, but there is a thin line around this text area that has the actual background (image or other colour) that is also visible briefly when resizing before it is redrawn properly.
On another note, I use it with cygwin and the vim syntax highlighting doesn't seem to work as it does in cmd.exe.