I just have to give you a BIG THANK YOU! I am a designer - upgraded to a new laptop and the latest versions of everything. Reinstalled my Sage Thumbs so I could see .psd, .ai, etc images on my thumbnails and everything was fine until I realized my preview pane images were small. Not the size of the pane. And even smaller than the LARGE Icons!
HOURS, registry edits, uninstalls, reinstalls and countless googles and nothing was fixing it. Then I saw your post. I didn't believe it would make a difference - but this was the magic fix!! Who would have thought that this had anything to do with the preview pane! Regardless - I thank you a million times over!