Comment 68 for bug 25830

Nope. That's precisely an example of the "really hard to solve" case that needs
a full fix to bug 11521. Note that this bug is talking about types we do _not_
handle internally, for which things are much simpler ("all" we have to do is in
the helper app code reset the type to something we handle and somehow kick the
load back to the browser). In the case of types we _do_ handle we need to
perform some sort of special reload or something like that... you get a number
of nasty cache-related issues, etc.