Segfault when running debug in Win7 x64 (gdb-MinGW)

[BitMaster]

I'm using Windows 7 x64 and I just installed the latest Qt 4.7.0 (x86).

With no changes to the configuration, i've created a test Qt GUI application. No code and no extra components were added. As i'm used to the Visual Studio environment i pressed F5 to launch the application. This should launch the debugger and eventually the application... but it crashes in a few seconds due to a Segfault. I have to manually kill the debugger.

I tried to install the Windows debugging tools (both x86 as x64), but enabling them in the options window has no effect at all.
In release mode any application compiles, links and runs fine.

Because I have to force-kill the debugger, the application output is empty.

edit:
I found some additional information about the segfault:
0 CMGxSrv!?removeCOMHook@@YAHXZ C:\Windows\SysWOW64\HsSrv.dll 0 0x1000b331
1 ?? 0 0xc5a84153
2 ?? 0 0x00000000

edit 2:
I searched for more details about the error above and I discovered that HsSrv.dll is part of my sound card driver (Asus Xonar D2X). How could this possibly be related to Qt?!