Source: RU forums (thanks to Fan_of_Bulba for the link) Hello everyone, just some quick heads up. Today, a bug was detected in the 7/42 code, allowing under certain conditions to use tier 9 and 10 tanks in team battles. I assume the same bug probably appeared on EU and US server too, since the patch was the same. The bug will be hotfixed, but according to the Russian developer, accounts abusing this bug will be permabanned (a few Russians already were actually, a list of who was publicly displayed for once). So… just don’t do it.

More...