With the advent of the KDE 4.7.0 release, it is possible to produce usable backtraces for Windows after experiencing a crash in a KDE application. At the moment, the following description is only valid for the Microsoft compiler, if somebody could extend this to the MinGW compilers, I would be very glad.
This assumes you have installed KDE with the kdewin-installer, selected the msvc2010 compiler and experience a crash in one of the KDE applications.
C:\Program Files (x86)\KDE-4.7.0> set _NT_SYMBOL_PATH="C:\Program Files (x86)\KDE-4.7.0"
C:\Program Files (x86)\KDE-4.7.0> bin\kmymoney.exe