Yes I noticed this yesterday as well. When IB says "Monday, October 10th" is the upgrade date, and then earlier TWS versions stop working on October 5th, it might be annoying to customers. Maybe next time, IB should double check their calendar.
FWIW I upgraded to the new desktop TWS - kept the same Java and API - and I haven't seen any problems with my auto-trader system. There are a couple new messages that show up in the Message Events and say something like "USA Server Farm Connection Okay" and "USA Futures Okay". Other than that, seems to work about the same for me.