Rendering of the form values in the request also has problems. I've modified the jinja2 template to pre-fill the change note using from values like this:

-          <textarea name="@note" rows="5" class='input-xxlarge' id='change_note'></textarea>
+          <textarea name="@note" rows="5" class='input-xxlarge' id='change_note'>{% if request.form.note %}{{ request.form.note.value }}{% endif %}</textarea>

And when I pass a note containing unicode characters I get the usual UnicodeDecodeError .