Elementary error : JCS code using double checked locking?

Guys

FYI, there's an embarassing error on your example documentation page
(http://jakarta.apache.org/turbine/jcs/UsingJCSBasicWeb.html) where the
BookVObjManager getInstance() method attempts to save synchronization
costs by using "double checked locking" (which of course is incorrect).

I hope I am wrong, but it looks like this mistake has been made in the
JCS code itself too...

Ben