I'm using 4.1 RC2 on Windows 7. When in the Develop mode, the edits I make such as cropping and tone adjustments do not show on the second monitor. In regular 4.0 the edits would be applied and would be visible in the second monitor after a short delay of course. Once I click on to another photo in the thumb strip and then click back on the original photo it then shows the edits on the second monitor. It basically isn't updating the second monitor until after the photo is reloaded.