java - Incompatible magic value 1010792557 for 1 client only -


i have 1 client getting error whilst applet working number of other users. 

java.lang.classformaterror: incompatible magic value 1010792557 in class file %classname% @ java.lang.classloader.defineclass1(native method) @ java.lang.classloader.defineclasscond(unknown source) @ java.lang.classloader.defineclass(unknown source) @ java.security.secureclassloader.defineclass(unknown source) @ sun.applet.appletclassloader.findclass(unknown source) @ java.lang.classloader.loadclass(unknown source) @ sun.applet.appletclassloader.loadclass(unknown source) @ java.lang.classloader.loadclass(unknown source) @ sun.applet.appletclassloader.loadcode(unknown source) @ sun.applet.appletpanel.createapplet(unknown source) @ sun.plugin.appletviewer.createapplet(unknown source) @ sun.applet.appletpanel.runloader(unknown source) @ sun.applet.appletpanel.run(unknown source) @ java.lang.thread.run(unknown source) java.lang.securityexception: class "%classname%"'s signer information not match signer information of other classes in same package @ java.lang.classloader.checkcerts(unknown source) @ java.lang.classloader.predefineclass(unknown source) @ java.lang.classloader.defineclasscond(unknown source) @ java.lang.classloader.defineclass(unknown source) @ java.security.secureclassloader.defineclass(unknown source) @ java.net.urlclassloader.defineclass(unknown source) @ java.net.urlclassloader.access$000(unknown source) @ java.net.urlclassloader$1.run(unknown source) @ java.security.accesscontroller.doprivileged(native method) @ java.net.urlclassloader.findclass(unknown source) @ sun.applet.appletclassloader.findclass(unknown source) @ java.lang.classloader.loadclass(unknown source) @ sun.applet.appletclassloader.loadclass(unknown source) @ java.lang.classloader.loadclass(unknown source) @ sun.applet.appletclassloader.loadcode(unknown source) @ sun.applet.appletpanel.createapplet(unknown source) @ sun.plugin.appletviewer.createapplet(unknown source) @ sun.applet.appletpanel.runloader(unknown source) @ sun.applet.appletpanel.run(unknown source) @ java.lang.thread.run(unknown source)

i believe magic value represents start of xml tag (based on incompatible magic value 1010792557 when trying run applet embedded in facelets). security error occurs after magic value error , suspect byproduct of first problem.

what can't fathom why happening 1 client only.

all clients using jre version 1.6.0_24-b07 , ie 8.0.6001.18702.

on clients machine have tried clearing cache, deleting temporary internet files, , deleting temporary internet files via java control panel. have tried deleting certificate javacpl 'trusted certificates' list , turning off verification javacpl>advanced>security>mixed code.

i'm out of ideas , love hear suggestions on problem/solution might be.

oh, applet hosted in java wicket project running on tomcat 7.0.19 via apache 2.2 (on windows server 2008).


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