I encountered the same problem today.
Using strace it showed that it is trying to open:
/usr/lib/qt4/imports/Qt/labs/components/qmldir
Which apparently is not there.
But we have:
/usr/lib/qt4/imports/Qt/labs/components.1.1/qmldir
and
/usr/lib/qt4/imports/Qt/labs/components/native/qmldir
as alternatives.

On a first quick shot it seems like copying the stuff from
/usr/lib/qt4/imports/Qt/labs/components.1.1/*
to
/usr/lib/qt4/imports/Qt/labs/components
results at least in the application being executable.
This is actually not a nice fix but should do as a first hack to see whats going on.
While you are at it one might want to install the packages
qt-components-base-icons
and
meegotouchtheme
to fix most of the "missing icon" messages that will come next.

hth


ps: It might be worth to file a bug report with respect to this issue.