[big snip ...]
> Is there another way to accomplish the same thing, without tacking the error
> on to the redirect URL?
Probably not, no. I can't see where you'd store the errors. In the session
would cause problems with synchronisation, and on the redirect URL
could cause buffer problems (with more then 1024 bytes of errors).
You could store it in the session, if you used a unique identifier
to store them, and pass that identifier through to the redirected
URL.
I'd think you need to look at *why* you don't want the action URL
displayed in the first place. You could always be sneaky and use a
hidden frame to force the URL to always be the same.
