[ghira]

When I sideload multiple books my kobo sometimes refuses to recognise any of the files.

Came to realise that it looks like if _any_ files contain ",_" in the file name, the entire batch will fail to be imported until I rename them.

I had run into single unacceptable characters before but as far as I recall , and _ separately are both ok (though maybe I should check this) and it is ",_" together that causes problems.

Is this a real phenomenon? Are there other combos to watch out for?