[Qt-interest] #error "You are building a 64-bit application, but using a 32-bit version of Qt. Check your build configuration."

[Harry Sfougaris]

I uninstalled Qt and reinstalled a fresh copy of Qt on my Mac (Snow Leopard).
Upon trying to build/run my project, I get the error:
/Library/Frameworks/QtCore.framework/Headers/qglobal.h:288: error: #error "You are building a 64-bit application, but using a 32-bit version of Qt. Check your build configuration."

Does anyone know what this? I'm new to Qt, and I don't remember seeing a 64-bit SDK anywhere (like for Linux).
Evenmore, I don't remember seeing a setting in Qt Creator regarding 32/64 bit.

Can anyone please help?

Thanks,
Harry Sfougaris