JOHNE - Given that a stable release (2.3) is due imminently, our own stable branch will use that number for locating 'loaders.cache'.  Note that the folder paths actually contained in 'loaders.cache' will probably need to get generated at run time by Mixbus (like we already do for 'pango.modules' etc)
JOHNE - Ensure that 'targetsxs.h' gets #included for all pixbuf loader DLLs