So, like the subject says, when I move the slider in some twirl down menus - say 'particles per second' - it will jump from 60 to hundreds of thousands with the slightest adjustment. It happens in other twirl down menus as well, though not all of them. For example, transform controls don't give me grief.
There are more but I can't recall or replicate them at the moment. I'll post more as they occur.