Static Qt RC2 in Ubuntu 12.04, crash with message: Cannot create accessible interface for object

Built static Qt5 RC2 from source in Ubuntu 12.04, using following configure:
./configure -release -opensource -static -qt-xcb -nomake examples -nomake tests

My app as well as the example apps build successfully and will run. However, as soon as I interact with either a QMenuBar or QMainWindow, whichever program I'm running will crash, printing one or more lines like the following to the console:

Cannot create accessible interface for object: QMenuBar(0x9c9dc60)
The program has unexpectedly finished.

Which object it prints depends on what I'm interacting with. Note that while interacting with virtually any widget results in a variation of the above warning being printed, the only two objects I've found so far that cause a crash are a QMenuBar or a QMainWindow, or any widget that inherits from them. Specifically, mousing over a QMenuBar causes a crash, and for a QMainWindow, clicking the title bar, or trying to resize it causes a crash.

There may be more ways to trigger a crash, but these are the ones I've found so far.