I'm in the process of creating a new main save as my last one got corrupted. I salvaged what sims and lots I could and am now placing them in the new save. One odd thing that I have run across is that when I use the cheats to recreate a university diploma, all the replacements are for an Art History degree, not the actual degree the sim earned in the previous save. Each sim does show the correct degree in the sim panel though. This has happened for every sim in my game that had a degree, so it wasn't a one-off event. I have rarely used this cheat prior to now and don't know if it has always been this way or how long this has been happening. I do play with mods, but I also tested in a vanilla save with the same result.
Edit By crinrict: Added Tag to Title, Adjusted Title
