With new Plug-in the jar cache versioning is not working properly. Archives with cache versioning information should get dumped to the deployment cache dir but that's not happening with new Plug-in.
Steps to reproduce
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1) Install latest PIT-08 bundles
2) Invoke following testcases inside the IE browser
http://sqeweb.sfbay.sun.com/deployment2/jitu/plug-bug/cachingtest/new/TestMJ_CA_CV.html
http://sqeweb.sfbay.sun.com/deployment2/jitu/plug-bug/cachingtest/new/TestMJ_CA_CVNew.html

Close the browser
3) Invoke Java Control Panel > General > View
One can notice 2 enteries against archive a.jar with versions 1.0.0.123 and 0.0.0.123

4) Remove both the a.jar enteries from the cache viewer and close the cache viewer
5) From Java control panel switch to new Plug-in as follows
JCP > Advanced tab > Java Plug-in
Check the oprion "Enable the next...."
Close the JCP
6) Invoke the above mentioned applets again inside the IE browser

7) Invoke Java Control Panel > General > View
If you notice only one a.jar entry and that's also without any verion then bug is reproduced