Do you also have to modify the juce source code to build successfully in windows? With the latest code and and the version of mingw32 suggested in the Csound repo I had to apply this -> http://www.juce.com/comment/314826#comment-314826.
With the one installed using mingw-get I couldn’t even tell what the problem was because it produces garbled output in my console (cmd.exe).
Now, I am going to try to reproduce that error you were saying about comboboxes entering in a loop with the host when they are refreshed after a snapshot has been loaded.