So, I just realized that I had the Data Object Manager named incorrectly. I corrected the folder name on the local version of my site and Uploadify now works just fine. I just tried changing the folder name on my demo server, rebuilt the database, flushed, refreshed, emptied the cache and I'm still stuck with the previous broken interface in the Files and Images area.
Any thoughts on what I should look for on the demo server that might still be causing an issue?
Thanks!