1.Clarify that ForkJoinTask.get() ( and timed get ) on throw InterruptedException if the current thread is not a member of a ForkJoinPool and was interrupted while waiting.

2. Propagate ThreadFactory exceptions back to the user. We can only do so sensibly if the immediate cause was in the course of creating a new thread due to an external submission. Otherwise we have to ignore.

3. It is possible for shutdown not to transition to termination if "pool.invoke(task); pool.shutdown()" completes before all initial threads are started. Should transaition.