Jquery UI Autocomplete doesn't allow options to be selected with mouse anymore
jquery, jquery-ui, jquery-ui-autocomplete
Solution
In my case the mouse selection capability was disabled by an outdated third party jQuery plugin. This thread gave me an idea of what might be wrong: http://forum.jquery.com/topic/autocomplete-click-to-select-item-not-working-in-1-9-1
I was using an old version of jquery validation plugin (https://github.com/jzaefferer/jquery-validation). I disabled one plugin after another to see which was causing the misbehaviour.
Problem
I recently updated jquery ui and its autocomplete plugin - however in the newer version it won't let me select the options with a mouse click and I have to use the up and down arrows. How do I re-enable selection via mouse click? Btw the new version is 1.9.1, old version was 1.8.2