[Qt-creator] Qt Commercial Mingw - QtCreator cannot decode my source file with UTF-8 encoding

[Pete Klemm]

I installed qt 5.0.1 commercial mingw and I now get this error
when trying to edit my project:

Error: Could not decode "iobrd.cpp" with "UTF-8" -encoding. Editing not 
possible.

This used to work with qt 4.7.4 opensource mingw.

Is this possibly due to missing unicode support in the commercial release??

Any thoughts??