Hi guys, thank you for your replies so far!
Interesting issue. Let's ask nikfreak to prepare a debug binary based on the dm-spy-experiments branch.
I have no idea what you just said

block the shutter button with gui_uilock(UILOCK_SHUTTER)
Sorry, I am a noob with this. Do I have to fiddle around in some code? I could not find anything in the menus.
If your issue existed before ML than ML won't fix your issue. Also got 100D.100B and don't have your issue. So it's not software related. Your battery (pins / door or whatever) seems to have an issue. At least this is what google tells me when searching for your issue. I can ofc provide you with the special build a1ex asked for tomorrow.
I was hoping that ML runs its alternate code based on a correct basis that comes with it... One can dream

With software I rather meant "not hardware". Nothing to do with ML, just code. I guess...
On physical inspection, the pins, batteries (new) and door look good. Everything else is functional, except pressing the shutter button.
I check google, but I might have got country specific answers which were... useless.
Thanks for the build but as I am a noob, I will need a bit of instruction

(I am not a full noob regarding computers as I build my own computers, modified html, css etc. on my website and in general I am a fiddler. But I am new to ML, have no idea on what basis this works and so on. Just so you know

Not great but better than average lol )
(might be worth putting this in a separate thread not to "spam" this one? )