Today, I saw a Zope out of control (for the first time): It started with the report of a colleague that he can not upload an object. I checked the log file and indeed, Zope reported: cannot load object <objectid>: string length does not match ... Additionally, Zope (2.1.6) died continuously, after about every minute. The computer was quite slow. Thus, I check with "top": load between 130 and 250, changing rapidly, more precisely: oszillating between these two values. I informed our system administrator. He recognized that the zdemon process had 999 threads. After this process was killed, everything returned to a normal state. I do not yet know what went on this afternoon. Just want to let you know about our experience. Dieter