I'm experiencing regular crashes using NaturallySpeaking 12 Premium. Two easy ways to trigger the problems:
NaturallySpeaking 12 is undoubtedly the most unstable version of NaturallySpeaking (or even DragonDictate all those years ago) I've used.
A regression compared to Dragon NaturallySpeaking 11.5 is that oftentimes, the alternative entries in the list brought up by "correct that" are sparse and contain only different capitalizations of the misrecognized text. I characterize this as a significant usability concern.
Furthermore, another regression is that it needlessly adds a space at the beginning of every dictation into a textbox in which NaturallySpeaking cannot directly edit, e.g. into an instant messenger window.
My platform is Windows ultimate 64-bit, 16 GB of RAM on a Lenovo W520. I'm experiencing stability problems with no other applications. I'm using a user profile that I created specifically for NaturallySpeaking 12.