For example, on 3/10 in ZFIN, if you have an old format URL that
points to the old pages, when you perform any operation (form/filter) or
click any link on the old pages, it automatically boots you to the new
pages where what you did in the old form resets--not an issue if you
clicked a link, but strange if you performed a filter or something. Besides
the functional difference, the jump in physical styling and placement is
jarring as well.
Since we (again, for various arcane reasons) can't easily remove the old
pages completely right away, how about a warning message and link to the
newer style page?
An alternative would be for AmiGO to try and detect antiquated paths and
try and forward the right ones to the new pages. I'll take a look and see
if that's doable (it's always hard to keep the various rationals for cruft
in my head).