Hi, all.
Although we have been keeping somewhat up-to-date with bugfix versions of the gtk+ C libs for the last year, the C++ libraries (libsigc++, glibmm, gtkmm) have not been updated at all in that same time, and I have been worried that a mismatch might start generating bugs.
So today I built those libs atop the current gtk+ libs, and uploaded them here: http://inkscape.modevia.com/win32libs/gtk28-060820.7z
You don't really -need- this one, but if you use it, there is one small difference. Since the previous gtkmm set was built with the cross-compiler, the variable GLIBMM_DLL was not defined properly. So to make the compiling and linking with DLLs work ok, we define it in Makefile.mingw.common as -DGLIBMM_DLL.
In the new set, that variable exists properly, so you will get warnings that GLIBMM_DLL has been redefined. I guess in a week or so it would be good to take it out. But for people who have the new stuff it is a warning and with the old stuff, it is an error. Better safe than sorry.
bob