Thanks...though it would have helped if you told me where that variable was. I found it in
cuteeditor_files/Dialogs/aspuploader/resources/coreimpl.js
and changed "Auto" to "Iframe".
Since the iframe uploader is an intentional feature, and since it seems like lots of people need it to overcome permissions problems with the Flash uploader, an I might suggest you make this a configuration option. Having to dig around in a minified JavaScript file to change this is a bummer. Thanks.