I'm getting no help on the Blizzard forum so I thought I'd ask here.
The problem I'm having is that during a game of starcraft, sometimes when I try to select things it doesn't work. Its kinda random, but the pointer will turn into the windows pointer instead of the starcraft one.
Obviously this makes it impossible to play the game.
The pointer changes specifically when I highlight certain things (some units and some mineral patches, for example).
Clicking then has no effect.
I'm playing on a laptop connected to a monitor (I don't know if this is relevant) - and the performance is pretty bad - I have to play with everythng on low.