I think I can still compile (and test) 1.6.x, so I'll probably be able to provide the 3rd sig for 1.6.21. But then I'll hold off on testing 1.7.9. Maybe someone else can take care of the 3rd sig for 1.7.9 then ...
Of course, if someone is already working on the 3rd Windows sig for both releases, please let me know ... -- Johan