10.1.4 breaks the Excel Solver add-in.
I rarely use the solver except for a few weeks every year I use it with a large group of students.
Now it is nearly that time of year again and I always run through the class exercise just in case... whoops... I find Solver does not work in v10.1.4 more than once per worksheet, after which the whole of Excel unexpectedly quits. Bummer, I will have to fall back to a Windows platform. (Bill punches the air for another minor victory...)