Which tool are you using, and which platform?
I use the selection tool, myself, and for that you need to press BOTH Ctrl (PC)/Cmd (Mac) and Shift before dragging to scale proportionally. On windows you must press the keys before clicking the mouse.
How did you replace the preferences? Directions to do it properly are at Replace Your Preferences
I am on a Mac 10.9.2 using InDesign CC.
Yes, I am talking about the selection tool. Cmd and Shift does nothing still, prior or after clicking.
Yes, I followed that article to replace preferences.
Thanks for the help, but any other ideas?
Check your system prefs for shortcuts used by the system, or for other applications that might be hijacking the key combo. Seems to me it's the latter, but not certain. You may find some other threads about this here, it was a common problem when folks started switching to Mavericks.
Not sure what was going on, but I copied everything in the Library/Caches folder from my Macbook Pro InDesign, and pasted/replaced it on my iMac...restarted, it is working now.
Thanks for all the help Peter.