Jquery ui - hover problem autocomplete combobox

Jquery ui - hover problem autocomplete combobox

Hello, i've a little problem with hover. I want change background color of "li" element in the list, it's easy to do using code like that ".ui-autocomplete li.ui-menu-item a:hover{background: blue;color:white;}". This css function work perfectly, but a little problem is present. When my cursor is over the selected element, the "hover" css work correctly, but when i move my cursor, the background color change into default state only for one second This problem is present only from 1.9 and later version (about jquery - ui). Can you help me please ? Thank a lot.

 you can test here the problem -->   http://jsfiddle.net/tVvxh/1/