FULL PRODUCT VERSION :
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) Client VM (build 19.1-b02, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600], Microsoft Windows [Version 6.0.6002]

EXTRA RELEVANT SYSTEM CONFIGURATION :
using IE8, firefox 3.5.5

A DESCRIPTION OF THE PROBLEM :
Whenever I run any applet in browser, I always get few messages as below,
network: Cache entry not found [url: http://localhost:8080/myapp/celcius.jar, version: null], 3-4 times in java console,
though the jar is already in cache. And it takes more time to load the applet. The same message appears when i run the applet with plug-in 1.6.10 or later. The messages doesn't come for plug-in version before 1.6.10. Also these message (cache entry not found) doesn't come if I disable the "next generation java plugin" from java control panel and subsequently applet loads faster.
p.s I have also set the version but in the message it is showing version:null

REGRESSION. Last worked in version 6u24

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
The steps I follow to create and run the applet.
- Compile it to a jar
- Sign the jar
- Run it as a applet in a browser (I use both firefox 3.5.5 and IE 7/8)
- Make sure browser has Java Plug-in with version1.6.0_10 or later
- Make sure "Enable the next-generation java plug-in" is checked in java control panel.
- check the debugging in java control panel and show console is also selected
- now run the applet in browser

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
It should not give network: Cache entry not found [url:http://localhost:8080/myapp/celcius.jar, version: null] messages in java console if the jar is present in cache, and should load the applet faster as it does with plug-in before 1.6.10.
ACTUAL -
Please find few messages from java console
.
.
network: Created version ID: 0007.0000.0037.0000
network: Created version ID: 0007.0000.0037.0000
network: Cache entry found [url: http://localhost:8080/myapp/celcius.jar, version: 0007.0000.0037.0000] prevalidated=false/0
cache: Reading Signers from 966 http://localhost:8080/myapp/celcius.jar | C:\Documents and Settings\superuser\Application Data\Sun\Java\Deployment\cache\6.0\12\30f14dcc-72abd6e6-0007.0000.0037.0000-.idx
cache: Read manifest for http://localhost:8080/myapp/celcius.jar: read=89 full=14528
network: Cache entry not found [http://localhost:8080/myapp/celcius.jar, version: null]
security: Loading Root CA certificates from C:\Program Files\Java\jre6\lib\security\cacerts
security: Loaded Root CA certificates from C:\Program Files\Java\jre6\lib\security\cacerts
.
.And takes much time to load the applet.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
No error messages observed. Applet works fine.

REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
1. disable the "next generation java plug-in" from java control panel
2. use any java plug-in before version 1.6.10