Cancelling an order / order erroring out returns the user to a page with no menus.

Hi guys, I know why this is happening - because D6 won't return a menu when it doesn't know what the current page is - so what's happening is when a user goes through to the bank's page, and at some point clicks cancel to get out of there and return to the site, the page that is displayed isn't a real "page", and so the menu / block structure isn't showing.

I'm sure we can hack around this in our templates, but is it possible to have the module handle this properly internally?