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https://issues.apache.org/jira/browse/MYFACES-3574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13911502#comment-13911502
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John Redwood commented on MYFACES-3574:
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I tested on chrome and on IE9/10 and same issues happening, Just not sure if 
the problem was only for IE7 (reported issue) - If it effects others then yes 
definitely look to upgrade our version but it is a long and tedious process to 
get that done. If there is a programmatic way to do it quicker would be great..

At the moment It's looking like jQuery to update the forms input field even 
though a second field has been added to the requests.

Doesn't seem to be the truncation issue though. Thanks heaps

> Update of 'javax.faces.ViewState' input elements fails
> ------------------------------------------------------
>
>                 Key: MYFACES-3574
>                 URL: https://issues.apache.org/jira/browse/MYFACES-3574
>             Project: MyFaces Core
>          Issue Type: Bug
>          Components: General
>    Affects Versions: 2.1.7, 2.1.8
>         Environment: Internet Explorer 7
>            Reporter: Mircea Toma
>            Assignee: Leonardo Uribe
>             Fix For: 2.0.15, 2.1.9
>
>         Attachments: MYFACES-3574.patch
>
>
> The issue resides in the JS code that is responsible for updating 
> javax.faces.ViewState key in the hidden input elements. 
> In IE7 during the second update the lookup for the 'javax.faces.ViewState' 
> named input element fails. The element[name] syntax is used for the lookup 
> which is known to fail for elements with complex names (such as 
> 'javax.faces.ViewState'). 
> When the lookup fails to find the input element a second input element is 
> created which will contain the new javax.faces.ViewState value. The next 
> submit will send two 'javax.faces.ViewState' parameters but only the first 
> one (the oldest) is read by the server state manager . This old key is not 
> known to the server anymore and  this causes a ViewExpired exception to be 
> thrown on the server.



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