Thanks for answer Melba,
Actually I did the same code to prevent from double-click.
But yes, I definitely am missing clicks, they are not eaten by any GUI.
On slow clicks, no problem, the script reacts as expected but on fast clicks it simply ignores ~80% of them.
Maybe it is in relation with my OS ? I am running Win7 x64...
Anyway, thanks...
Any other solution (except slow clicking welcome.