Replacing "ยท" with "-" in `wikiname` fixed this login issue.
+> Hmm, Recai sent me a patch a long time ago to handle utf-8 here by encoding
+> the wikiname. But it doesn't seem to work, somehow the encoded utf-8
+> value still doesn't make it through. (CGI::Session seems to have underermined utf-8
+> issues too.) Seems like I will have to possibly break some sessions and
+> entity-encode the wikiname in the cookie.. [[done]]. --[[Joey]]
+
+>> I confirm it fixes the bug for me. --[[intrigeri]]
+
(BTW, such a char was replaced by -I don't remember what encoding thingie- in my setup file, when running `ikiwiki-transition setupformat`.)
+
+> Thanks for the heads up, fixed that too. --[[Joey]]
+
+>> I confirm it fixes the bug for me. --[[intrigeri]]