[anna katzner]

i bought a Macally iOpti jr.-mouse for my iBook.
very neat mouse: small, optical, 3 buttons, scrollwheel.
(specs here: http://www.macally.com/spec/usb/inpu...e/ioptijr.html )

but sometimes (apparently completely at random) the scroll-wheel would not work. drove me crazy, as i could not see any pattern as to when or why this would happen. tried any available driver etc. etc. etc.

only today i realized what the reason for this erratic behavior is: that d*rn clear plastic casing of the mouse!

see, the scroll-wheel still uses an opto-mechanical-sensor (like the old apple-mice e.g.) - and when it's too bright around the mouse (direct sunlight etc.) this sensor simply ceases to function. result: no scrollwheelo.

very simple. took me months to get behind this.

hope this helps someone. it very nearly drove me mad.

anna (sane again)

[G-mac]

I've got one of those mice too, but never had that problem (not near a window). A very interesting find, however. All we need now is some non-beta drivers (for Logitech mice too).