I know member "AnotherOne" has this issue as well as a few others, so hopefully this can help you guys too! My CFP 22.214.171.124 is now displaying PROPERLY while still using 120DPI settings...here's what I did before I noticed this new change.
I run Nvidia Beta display adapter drivers for the Geforce 8800GTS card and noticed Nvidia had a new version out, 169.04 now. So last night I d'loaded the new drivers, uninstalled the 163.75 I had and installed the new ones. If you guys also run these Nvidia Forceware drivers, upgrade to the newer one and make sure to UNINSTALL the old ones first. The display is a mess after the reboot to finish the uninstall but it's workable to install the new ones.
After installing the new ones I had to go into the NTune utility and reset all my dual display options and re-adjust the color, resolution, and reffresh rates once more. 3 things to note if you use Ntune CPL for Forceware drivers, (1) newest one is version 5.05.47.00, (2) on the "Adjust image settings with Preview" page, check the "Let the 3D Application Decide" or you'll have troubles with Roxio MyDVD backgrounds (and possibly others, including this GUI issue), and (3) set the Flat Panel Scaling to the "Use my Display's Built-In Scaling" setting.
After this I went into Personaliztion (in Vista), chose the "Adjust Font Size DPI" setting and then "Custom DPI". Check the "Use XP Style Scaling" and grab the ruler with your mouse and move it around some but set it back at 125% which is 120DPI.
After that I decided to open the CFP CPL at which time it opened with a correct GUI size (which was not like that before last night), and my jaw hit the floor...literally.
So, I'm not exactly sure exactly when or which of these things finally kick started it into working, but one of them did. So, uninstall and reinstall your display drivers first and see if that's it and if not, try some of these others and see if that helps.
Me...I'm just stinkin happy to be able to finally get into this new beta and do some testing and tweaking!!!
Good Luck to you others, I really hope that one of these things helps you get your's going too! I really think it's probably reinstalling the display adapter drivers that did it myself. I think CFP's install routine now jumbles something up & reinstalling it after CFP is installed already, sorts things out once more.