[jre1.4.2]Debug information printed out in Java Console

Jre1.4.2_10 b03, Mozilla 1.7, QuickSilver GA

load http://baseman.prc/Basicfunction/liveconnect/133762/applet.html, the following messages are in Java Console (trace level = 0):

OJIPlugin acq Spontaneous pipe=10
Trying to enter spont monitor: 0
 OJIPlugin release for:Thread[thread applet-MayIScriptFromStart,4,http://baseman.prc/Basicfunction/liveconnect/128037/-threadGroup]
OJIPlugin releasePipe - exiting spont monitor
Current thread:Thread[Finalizer,8,system]
OJIPlugin: No AThread