Same Problem, Dell Mini 10
I know it's probably gauche to reply to a thread so old, but I see it has no responses, and it is relevant to my problem.
I have the same trouble double-clicking on icons, etc. I have a stock install of Debian Squeeze. Double-clicking works fine under Gnome, but in LXDE, I have to triple-click to get a double-click response.
Any advice welcome.