The program does not always keep up with my typing as I am writing. Often the program seems to freeze as I am typing, and does not move on to the new text until a few moments after I stop typing. The delay seems to get longer if I continue typing longer after I notice that the cursor is not moving, as I have done several times. It has not crashed, yet, but this delay is distracting and disconcerting.
Are you running the latest beta version (1.3)? That was a known and common problem that appears to have been fixed in that version.