I'm on a PC and I converted 5D & 7D footage using NeoScene to .avis, but now the footage has a histogram overlay (see attachment) in both Premiere CS4 and Windows Media Player.

How can I remove this?

Lucky you. That is a feature you are all supposed to get with the higher-end tools. In the system tray, find the "C" icon, and right click on in to expose the "Active Metadata" menu. In the menu there will be an item either called "Histogram" or "Tools" -- uncheck that item.

Thanks for the fast reply David! It's showing up as "Tools" on my install of NeoScene 1.6 (build 140)

Thanks again!