Hi,
I just detected a little issue with uint32 which is declared in the JUCE_NAMESPACE and is not accessible from certain files.
Adding: #define uint32 JUCE_NAMESPACE::uint32 #define uint8 JUCE_NAMESPACE::uint8
in the files that give compilation errors (FilterGraph.h, juce_VSTPluginInstance.cpp) , does the job.
BTW the 10.5 SDK and the Architecture (i386) also have to be changed in the project settings.
Cheers! I was also caught-out by the one where I needed to modify the juce project to build for ppc architecture (not just intel). That one gets me everytime I upgrade.