I wrote:

> Peter Bancroft wrote:
>
> > May I suggest something a bit tangential coming from a hardware background.
> >
> > Inside the mouse is a switch. Inside the switch is a metal contact. When
> > you click the mouse button, the little piece of metal is pushed down and
> > makes an electrical contact. When you release the mouse button, the piece
> > of metal springs up then down then up then down boiiinnnngggg. This is
> > called contact bounce.
> >
> > Maybe the G4 is so fast that it is catching these boiinnggss as multiple
> > mouse up and down events. One would usually expect that the mouse button
> > would be adaquetely de- bounced.
> >
> > Try another mouse and see what happens.
>
> Peter, I think you deserve the prize. Your hardware background is excellent. I
> didn't like the round mouse that came with the G4 and purchased a 3rd party
> mouse. It "seems" that IS THE PROBLEM, though I must admit, at this point, I have
> difficulty telling up from down, but reverting to the original G4 mouse does seem
> better. I had gotten so used to releasing the button quickly to "avoid" the
> problem, that I'm having trouble getting back to my normal "groove".
>
> Thanks all, I will keep you informed if this is NOT THE SOLUTION.
>
> Joe Wilkins
>
> PS -- Who woulda thunk a brand new mouse would be bad? I tried the "bad" mouse on
> my iMac to see if it is OK with a slower CPU, and the iMac then exhibited the
> same problem. So it definitely is the MOUSE and probably has nothing to do with
> the speed of the CPU. Good. I should be able to get my money back! I can also
> eliminate all of the FlushEvents I had inserted into my program.

As a further indication that it is the mouse, after having switched the "bad" mouse
to my iMac, I used it while reading eMail this morning. While deleting items from my
inBox, I suddenly noticed they were disappearing at an alarmingly speedy rate
indeed. Low and behold! My trash contained eMails I had not even read. It was doing
the same thing here that it had previously been doing to my dialogs, and probably
elsewhere as well - but unnoticed because of the location.

Again, thanks to Peter B. and everyone else who chipped in - mighty mouse fashion -
to save the day! Sorry if some of my replies were a bit too curt - puzzling
conditions precipitate puzzling responses.

Joe Wilkins