Hi,

In message "[ruby-talk:18751] Problem behaviour of 'singleton' library with thread"
    on 01/07/30, Alan Tsang <atsang / hk.linkage.net> writes:

|Problem:  control does not return to the main thread until the new thread 
|created becomes dead after 10 seconds

The singleton block other threads during object allocation, to avoid
duplicate allocation of singleton.  Maybe it blocks too much.

							matz.