Feature request from snky1987, posted on GitHub Jan 05, 2015
When I was in a sample category (201) and changed store group in a footer I received 404 error (which is correct).
I think it may be useful to reset view into main view when change store group (unless there is a option to show different products under the same category depends on store group).
It's not a bug but I am 99% sure that it will come back as an issue to any agency that set up Magento multi-store.