Hi,
I had the same problem; It seems to be caused by the new build directory structure of QtCreator 2.0: in 1.3, the build directory was "<Projects_Base>/<Project_Name>/", but in 2.0 it is something like "<Projects_Base>/<Project_Name>-build-desktop/".
The solution for me was to delete the "<Projects_Base>/<Project_Name>/debug" -directory, and all "<Projects_Base>/<Project_Name>/ui_*.h" -files, and then rebuild. Oh, and I also cleaned out the "<Projects_Base>/<Project_Name>-build-desktop/" -directory
I hope this helps,
<<Mark
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