I've only had their most excellent pale, dry, strong Winterbock up at Café Abseits. It says there that you can get more details at the Bayerischer Rundschau webbie, but I can't find anything there.
What you CAN see, however, is a report on how some unscrupulous hop farmers have used unapproved-for-hops pesticides the last couple of years. This has been in the papers a couple of times, but I failed to remember to post about it here. Apparently all affected hops have been recalled, none made it into any beer.