This bug is to follow up with 7024603.
The HTTPS connection can be created but the applet still threw exception.

Tested build: jdk7 b134-pit
http://rehudson.sfbay.sun.com/hudsonws/deploypit/bundles/linux-i586/b255-2011-03-09_48/
http://jre.sfbay.sun.com/java/re/jdk/6u26/latest/bundles/linux-i586/
Tested OS:Ubuntu 10.04
Tested browser: firefox 3.6

Steps to reproduce
1) Register browser with 6u26
2) Open the following applet
http://sqeweb.sfbay.sun.com/jsn/users/sheldon/webCases/cr4684648/AppletTest.html
3) Accept the security pop-up
4) Applet should run fine
5) Close browser
6) resgiter browser with b134-pit
7) Run the same applet agains
8) Applet should run fine and have no exception.Now the applet run fine but an exception is still threw.

java.security.PrivilegedActionException: java.io.FileNotFoundException: /home/javafx/.java/deployment/CacheUpgrade.properties (No such file or directory)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.config.Platform.getCacheUpgradeProperties(Unknown Source)
at com.sun.deploy.config.Platform.getCacheUpgradeInfo(Unknown Source)
at com.sun.deploy.cache.UpgradeStatus.beenInitialized(Unknown Source)
at com.sun.deploy.cache.CacheUpgrader.getSystemInstance(Unknown Source)
at com.sun.deploy.cache.Cache.getCacheEntry(Unknown Source)
at com.sun.deploy.cache.Cache.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.isUpdateAvailable(Unknown Source)
at com.sun.deploy.cache.DeployCacheHandler.get(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: /home/javafx/.java/deployment/CacheUpgrade.properties (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at com.sun.deploy.config.Platform$2.run(Unknown Source)
... 27 more