The text content of Java console is not same when it is opened from system tray icon and when it is enable inside JCP advanced tab to show automatiocally while launch of an applet.
Java console opened from the tray icon does not show few information like java version, user home location etc when it is opened from system tray icon.
STEPS :
1) Install java 6u10-b26
2) Go to java control panel -- > advanced tab, under java console tree, select Hide console. Under debugging tree, deselect logging, tracing.
3) Load an applet into any browser
( Applet : http://java.sun.com/products/plugin/1.5.0/demos/plugin/applets/BarChart/example1.html )
4) There will not be any Java console comming up, open it from the system tray icon (with right click).
If the console is missing some text information like (starting few lines), jre version, user home directory etc. The bug id reproduced.
SCENARIO-2 :
Try enabling show console under JCP advanced tab and load the same applet again. The java console comes up on load of the applet. Check for the text content, this time it is having the required information in it like which java version, user home loaction etc. Closing it and opening back from system tray this time does not lose that information.