I hope you're aware that Qt 5 is still not a "primary Qt target version" for us smile... in case anything doesn't work you're pretty much up to yourself. Anyway, thanks for the info! SVN r6187 fixes this problem (there's another Qt 5 compile issue with QMC2 Arcade fixed in r6188).

A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]