https://bitcointalk.oгg/index.php?topic=5154525.0#msg51488782
Firefox expands it to this:
https://bitcointalk.xn--og-hlc/index.php?topic=5154525.0#msg51488782
And then obviously can't find the site.
If I try this (the first 5 characters copied from the URL from the PM, then "test" added by me:
k.oгgtest
Firefox turns it into this:
http://www.k.xn--ogtest-pof/
What kind of sorcery is this?
Must be a diacritical sign I guess.