Problem when setting range

I've noticed this problem in latest FF, IE7 and Safari 3.1.2.

It can be checked on http://jqueryui.com/demos/slider/#colorpicker too.

The problem is if you set

$("#slider").slider({range: 'min'});

or

$("#slider").slider({range: 'max'});

for a single slider, when the slider reaches 0 you can't move it with the mouse anymore, only from keyboard. After you move it just once from keyboard all turns back to normal.

The problem seems to appears only if the minimum value is 0. If I set the slider like this:

$("#slider").slider({range: 'min', min: 1, max: 101});

everything works as it should.