When using a Chosen drop-down list inside of a jQueryUI dialog, an issue exists with the ESC/Escape key where if the user presses ESC while the drop-down list is showing (ie. results_showing==true) then instead of the drop-down list disappearing as expected, the entire containing dialog is canceled.

Please refer to this jsFiddle for a demonstration of the issue and a workaround fix.

This appears to stem from the dialog looking for ESC on keydown whereas Chosen is looking for ESC on keyup.

Hopefully there is a more elegant way to resolve this, ideally from within Chosen and not externally as shown in my demo.