Hopefully fixed in next week's release -- thanks Kovid!
https://github.com/kovidgoyal/calibr...60528cdcac8073
But replacing xdg-open might be interesting anyway.

I actually took a look at xdg-utils recently -- wondering why something wasn't working in a packaging script, I eventually concluded I must have imagined it ever working. I also discovered what a mess it is

the horror.
You do NOT want to know!
-- Ed