Yeah,I hv similiar problems with it .. since I started a few days ago ... it keeps hanging n' I hv to close the window and start over if I don't wanna wait .(and loose a lot of points too ) .. and sometimes,it doesn't even make the move at all until time's up !
.. sometimes,my moves can't get registered too !
I thot it was juz my internet connection being slow .
I've recently gotten back into tactics trainer, its like a love-hate relationship between us, and I found that the reaction times have severely changed for the worse. Before, I would do a problem, and once I made my move, it would either finish or continue almost instantly. Now, I've had to wait almost a whole minute to do a single 3-step problem because after each move I make, the trainer does not make any action for a while. This is not solely today, it has been happening for a while now.