Sorry to report here, but the reporting form on your fails to submit every time I hit 'Send' and just says Contact Admin.

When DM is active on flickr pic pages, the pic does not appear, but does when DM is switched off.

I've also noticed the header background image disappears on some web sites when DM is active.

Not a great problem as you have been clever enough to place the on/off switch on the toolbar for quick access.