I'm hearing sporadic reports of this (as well as builds attached to QT causing crashing in some cases). I think there's definitely a bug somewhere in there between QT + Builds.
Out of curiosity I just tested this on my machine at home - in both KN2 and KN1 and found it seems to be an issue in both... though i don't have access to a KN1 only machine here to see if it's endemic to the KN2 install.