like ?wicket:interface=:3:cont1:nav:next:3:ILinkListener:: behind, because
of a missing redirect.
This means, the comments in AjaxPagingNavigationLink#onClick and in
AjaxPagingNavigationIncrementLink#onClick seem to be incorrect, we DO need
to redirect to make sure the Ajax-Fallback works correctly.
Attached is a small example project that shows the effect as well as a workaround,
and a patch, which should be applicable both on 1.3.x and 1.4.x