[jQuery] SELECT with IE7

Hi Folks,
I use JQuery anf JQuery UI plugin for my web application. Some
troubles with select html tag have come since i use IE 7 to browse it.
It's not possible to select any option with mouse. It's works fine
with keyboard.
It's only possible with mouse when the focus is out of select area
(crazy!)
someone has encountered the same problem
Regards,
Olivier