I'm using MinGW-3.4.5 with GDB-6.3-2 and I have some troubles when running some of 
my applications in debugging mode and got stuck with this  

.
My OS is windows xp home edition and runs on a Fujitsu Siemens notebook (Amilo La1703)
with an AMD Sempron processor.
The problems occure when calling win2api-functions, for example calling a simple "Beep()" function
or "GetOpenFileName"/"GetSaveFileName" when trying to select a drive.
Here is the output when calling "GetOpenFileName" and selecting a drive (mouse click on drive list box):
Debugger messages:
Starting debugger: done
Registered new type: wxString
Registered new type: STL String
Registered new type: STL Vector
Setting breakpoints
Debugger name and version: GNU gdb 6.3
Child process PID: 2704
Program received signal SIGSEGV, Segmentation fault.
In RpcRaiseException () (C:\WINDOWS\system32\rpcrt4.dll)
Call Stack:
#0 77E827CA   RpcRaiseException() (C:\WINDOWS\system32\rpcrt4.dll:??)
#1 76302510   DllUnregisterServer() (C:\WINDOWS\system32\winsta.dll:??)
#2 00000000   ??() (??:??)
#3 00000001   ??() (??:??)
#4 0023CCB8   ??() (??:??)
#5 0023D0B4   ??() (??:??)
#6 0023D098   ??() (??:??)
#7 77ED360B   RPCRT4!CStdStubBuffer_CountRefs() (C:\WINDOWS\system32\rpcrt4.dll:??)
#8 0023CD04   ??() (??:??)
#9 00000000   ??() (??:??)
#10 0027E868   ??() (??:??)
#11 00000000   ??() (??:??)
#12 0028F59A   ??() (??:??)
#13 0023D630   ??() (??:??)
#14 0027E868   ??() (??:??)
#15 00000068   ??() (??:??)
#16 0023CDCC   ??() (??:??)
#17 00000000   ??() (??:??)
#18 00000000   ??() (??:??)
#19 00000000   ??() (??:??)
#20 76302560   DllUnregisterServer() (C:\WINDOWS\system32\winsta.dll:??)
#21 FEEEFEEE   ??() (??:??)
#22 00250000   ??() (??:??)
#23 00289E80   ??() (??:??)
#24 00000000   ??() (??:??)
#25 0023CCD8   ??() (??:??)
#26 00000000   ??() (??:??)
#27 00000000   ??() (??:??)
#28 00000000   ??() (??:??)
#29 7C936ABE   ntdll!iswdigit() (ntdll.dll:??)
BTW:
When I use my old BCC55 compiler with TD32 debugger with the same projects (just another target), all works fine!
Also when I debug the same program on a desktop pc with windows xp prof. and the same compiler/debugger config.
Does anybody have an explanation for that?