IT seems not all JIRA tickets are mirrored on http://ask.clojure.org? That means I can't upvote all of them, like this one for example: https://clojure.atlassian.net/browse/CLJ-2568, unless I'm just not finding it?

in general, most are but there are a small number that were created directly in jira since the migration without coming through ask. if you find one like, feel free to make an Ask variant of it.