I am getting the error described before in Moodle 1.9 where quiz edting (and some other) pages cannot be served, seemingly due to specific charcacters being in the returnurl parameter. However, the fix described here to unset Verify Normalisation in the ISA server has not fixed this for me. Looking at Microsoft Knowledge Base, it seems I should now try to turn off the Block high-bit characters check box in the ISA Server [- but I won't be able to try this for a day or two, due to network specifics here].
Has anuyone else encountered and resolved this (either as above via the ISA server settings, or otherwise)? It seems quite critical, meaning that in practice staff cannot create quizzes, since many of the add/edit question screens produce this error. And isn't there a Moodle coding solution (i.e. server-side) to 'fix' the returnurl being set, rather than rely on the client's ISA settings to permit certain pages to display?