I was on this page and frequently doing previews while editing, but I don't know
the exact details (I am always confused of the location of the edit links, hence
I did not notice the error first, I thought it was my error).
Right now, the edit-links are shifted, i.e., pressing the one one the level of
Usage, brings up the edit page for history, on the history one for mutual
recognition agreement and so on, leaving no edit link for Usage.
Please note, that I caused the effect under Firefox/Windows, but under
mozilla/Linux (now at home) I reproduced them. Though I did not try to edit the
page to continue the shift.
I notice, that the links look fine, i.e. section=1, section=2 and so on.
After I noticed this behaviour, I edited the usage part (last paragraph) via the
main tab, as I could not reach that paragraph with a direct link.
I hope this is not yet reported. I tried to search for "edit and shifted" (also
without and) but I always got many results, and those I looked at were different
but I might have missed it.