Ok, here is what I found with your -1 version.
1. It seems to have fixed the flash not-working issue, as in, my S110 now works with flash again and your MDFB2013-1.
2. When I loaded the -1 version it had the Splash Screen on and that screwed up things. It kept firing away after saving the pic. Also, I couldn't see the screen grid either when the MDFB Splash Screen was on. As soon as I turned it off, all worked as normal, including the grid and the flash.
3. One other issue I still have, in comparison to how the original works on my S100, is that I can power the camera down when [alt] is showing at the bottom with my S100. I can't power down with this new setup and my S110 unless [alt] is not showing. Perhaps this is a CHDK issue and my S110? It's not a deal breaker of course as it's just making sure I'm not in [alt] and then the power button works. Just FYI.