When I began programming with QT earlier this year I ran into the same Problem.

When you run from Creator everything works fine. But when you run the EXE it complains about missing DLL(s).

I think this has something to do with the build configuration... (have not found how to solve it here)

But, i found that if you copy the Dlls into the applicationfolder it will link and run... You might need more than 1 dll, depending on what Qt Modules your programm uses.

For me it was necesary to copy following Files (Application is a Custom rich Text Editor)

mingwm10.dll
msvcrt.dll
QtCore4.dll
QtGui4.dll

Somewhere I found an Article that lead me to this solution including a small app called "Depends" which will help you find out which dlls your exe needs.

I hope this helps...

Eric