This has been going on for awhile, but it is intermittent - about every 3 - 8 times the fluorescent light in a closet off the bathroom are turned off, one of the two GFCI outlets in the bathroom will trip. 95% of the time, it is one particular of the two GFCI outlets in the bathroom. The fluorescent light will still turn on with the GFCI tripped. This will also happen - about every 3 - 4 times - with fluorescent lights in my garage. The lights there will also still work with the GFCI tripped.
The bathroom GFCIs seem easily tripped by what I am 99% certain are non-faulty appliances (hair trimmers, electric tooth brush, etc...)