Of course I have the same problem,
Till now I was waiting, sometimes a lot, ant I was always able to save using the incon in the menu; then exit and restart.
I will try to shut down some application next time, it is may be faster.
I don't think it is a memory leak, the task manager do not show any evidence of it.
As a side effect, I have sometime windows with is affected: I cannot call the task manager, or switch to another application.
Last, very often, the keyboard is switched from french to english, very bad to type a number...