I am using jquery ui 1.8.5 and jquery 1.4.2, but when I upgrade to 1.4.3 I start getting a bug where when you drag a sortable section the cursor triggers text selection highlights and has a flashing blue effect. you can see it here: http://jsfiddle.net/kBzWr/1/ . Also you can see how it was working properly with 1.4.2 here: http://jsfiddle.net/kBzWr/3/ .
I am experiencing the same issue! When I drag however there isnt that flashing of the highlight, it just highlights the text and empty spaces and stays highlighted.
If anyone knows why this is happening in 1.4.3 please let me know.