I have painfully cancelled all w-b3 WUs. According to doc they stay in the database but are marked as "not needed". I have also disabled further WUs of this type until we sort it out. Hope to have saved some 65,000 valid WUs. We shall see tomorrow. Please post to this thread if further problems (I have restarted as root...). It will probably take some time to get back to normal. Report will follow in due course.
More...
