copying http://ru.wikipedia.org/wiki/Пуштуны , and pasting it to another place/application should get http://ru.wikipedia.org/wiki/%D0%9F%D1%83%D1%88%D1%82%D1%83%D0%BD%D1%8B because decoded URL is not legal. In another word, we should encode URL before placing it to clipboard.
Firefox handles this in urlbarBindings.xml: http://mxr.mozilla.org/mozilla-central/source/browser/base/content/urlbarBindings.xml#286
Will not block a release, but it's surely wanted.
Neil, You still don't like the Firefox way? I can make patch, then we always can change it to something better.
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