On several occasions over the last 3 weeks, the system has not accepted a mouse click on the extreme right of the display. Playing South for example, with the cards arranged as normal across the bottom of the screen, the Q32 of Diamonds was showing on my extreme right. I wanted to play the 2 of Ds, but the mouse click wouldn't take. I changed computers and mice with the same result and the phenomenon has happened on both my laptop and my desktop. It's disconcerting. While playing in an event last night as declarer sitting S, I had a D lead and I held Q3 in hand and Kxx on table. I played low and the AD appeared from E. I therefore wanted to play the 3 but, as above, the selection was ignored. The director was called and he replaced me with a robot while I changed computers. It didn't really help because the problem occurred again later in the event. It's an intermittent problem but it now occurs regularly. Any ideas?? Ipwatcher