[edit: It works again. Have no idea why???] Replaced the batteries in my Apple BT mouse tonight. The red light's on. The computer recognizes it. The computer accepts clicks from the mouse. The cursor won't move when the mouse moves. Are the cursor and the mouse in a battle of wills? Can anyone offer advice? I've unpaired the two, rediscovered, removed the batteries and restarted. Twice. No luck. Thanks.