OSX 10.7.4 / Java / Crashing browsers when in webmail

[MACscr]

Release 7.2.0_GA_2669.UBUNTU10_64 UBUNTU10_64 NETWORK edition, Patch 7.2.0_P1.

On OSX 10.7.4 systems running any browser and the latest version of java from apple, whenever a user logs into webmail, it crashes the browser or the tab zimbra is running. Whats odd is that it will even crash the admin tab of zimbra if i have that open in Chrome as well, even though the admin area of zimbra worked fine before opening an account. This issue doesnt happen with all accounts, but it appears to happen with most. Especially ones with calendar reminders for the day, though i havent isolated it to just that.

Action:

I have enabled the java console window while logging into webmail and the following error is shown:

Java Plug-in 1.6.0_33
Using JRE version 1.6.0_33-b03-424-11M3720 Java HotSpot(TM) 64-Bit Server VM
User home directory = /Users/macscr

java.lang.ClassFormatError: Truncated class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader. java:631)
at java.lang.ClassLoader.defineClass(ClassLoader.java :615)
at java.security.SecureClassLoader.defineClass(Secure ClassLoader.java:141)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Ap plet2ClassLoader.java:247)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(P lugin2ClassLoader.java:249)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Pl ugin2ClassLoader.java:179)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Pl ugin2ClassLoader.java:160)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 47)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Plu gin2ClassLoader.java:678)
at sun.plugin2.applet.Plugin2Manager.createApplet(Plu gin2Manager.java:3045)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionR unnable.run(Plugin2Manager.java:1497)
at java.lang.Thread.run(Thread.java:680)
Exception: java.lang.ClassFormatError: Truncated class file

This crashing problem of the browser with zimbra webmail is repeatable on Firefox, Chrome and Safari on my mac. Most home user are using Safari and are having the issue as well. I can confirm that java appears to be working fine with other web based applications that use java.

[bmw]

This is confirmed. Having the same issues with mostly Firefox =>v12.x on Mac OS =>10.6.x. Some cases Chrome, too.
Getting error that Java 1.6 or higher needs to be installed.
This is a serious bug.