Update required for field instances using options_select widget
Issue #2213231 changed the configuration for field widgets that can use Chosen from a checkbox to three states for applying Chosen to the widget: No preference, Do not apply, Apply. Any field widgets that had this option checked in older versions will remain as 'Apply'. Any options_select widgets that had this value unchecked will now have a value of 'No preference' which possibly allows the site-specific settings to apply to the select field. To manually force Chosen to never be applied to a field widget, use the new 'Do not apply' option.
For those of you that were previously using 7.x-2.0-alpha3 and 7.x-2.0-alpha4, you should know that jquery_update is no longer a dependency for this module, as long as you update to the Chosen v1.1.0 library as noted above.