Hi @sibilant
Thanks for the heads up. I wasn’t aware. I rarely user Grabr myself these days.
I will take a look at it. With a little luck Apple have only changed web-address and it will be easy to fix.
However I have a dilemma. Current version of Greasemonkey have a bug, and if I update Stig’s Art Grabr on Greasy Fork before that bug is fixed, Art Grabr will probably be disabled for all Greasemonkey users 
Well, I try to correct the Grabr error, and then I decide whether I update the official userscript now, or if I stall it until Greasemonkey has been updated. A fix for Greasemonkey is apparently pending, but don’t know when it will be released.