compile / link error mingw-make release

[jm]

So do you or don't you have libqtmain.a?

I have a libqtmain.a, but when I use the original one, I get the errors described above.
When I rename the debug version and try again... everything is fine.

I don't want to build static. I want to build my app dynamic and I tought that I do it.
I don't know why the libqtmain.a file is choosen from minGW. I have downloaded the qt-win-opensource-4.6.2-mingw.exe and installed it. I also use the function: Build Debug Libraries... and it works.

I don't use the CONFIG += static option in the pro file.
So why is mingw trying to link to the libqtmain..a?
I don't know what I can do now.

Thank you very much for your help.
JM