Actually there are no reintroduced bugs that we have found as they are fixed as they are found.
Arnie thought and reported something like that till he found out indeed by mistake he was uploading older files he helped me test with. Once he downloaded the current build at the time all is okay.
Being since you where a tester as well this could be the case.
However our case has always been as long as its not reachable by the internet you can install a test site