mac universal access voiceover crashes Qt Creator and other Qt-built programs

On Mac 10.5, and also 10.6, turn on VoiceOver from Univeral Access preferences. It may be that some of the other settings must also be on. Then launch QtCreator 1.3 (as downloaded and installed from the Qt 4.6 SDK). After a short delay, it crashes.

I've attached two mac dumps from other machines with a similar crash, in this case from the software we're building with Qt. In the dump2 case, which is a 4.5.2 version of the problem, our application, fritzing is displaying a web page which does not have any flash content in it.

Dump3 is from the Qt creator crash. We've seen this behavior on two different macs, running qt 4.6, QtCreator 1.3, as downloaded and installed from the 4.6 SDK. Possibly complicating matters is that both these macs also had prior 4.5.2 Qt installations which might only be partially cleaned up.