You've probably heard that Airberlin has filed for bankruptcy and is now being ripped apart and sold in pieces. The German government was allowed to keep operations up until mid-November by granting a loan, however, that money is most likely going to be used-up way before that. The airline will be grounded soon. If you already have a ticket for later than November you will lose your money unless you can rebook to a date within the next 6 weeks and fly it off. Also Airberlin Topbonus miles have become worthless.
Deutsche Bahn had a construction site accident along the Frankfurt-Basel route and will not be able to operate any rail traffic between Baden-Baden and Rastatt until October 7th. If you must use this route your train will end in one of the two cities and a bus will take you to the other where you have to board a new train. You can avoid this by booking the route via Zurich and Stuttgart rather than Basel via Karlsruhe or Mannheim...