AW.UI.Combo in FF 3.6 not closing on lose focus

I'm currently experiencing an issue which seemed to be fixed some time ago. If my combo's popup gets shown, then I click anywhere outside it, it will not hide. It will only hide if I click on a different AW control on the form (or select a value in the list). When I run the demo on the themes, they all exhibit the same behavior. I'm running AW 2.5.5. Any assistance appreciated.