Description field blank

Description field blank

Ever since upgrading to 4108 from 4104 when we open a ticket the description field is blank, if we hit f5 to refresh it then appears.  We upgraded to 4109 this morning hoping that would fix it, it has not.  Yes we have cleared cache, tried different PC's, different browsers, the problem is the same.  If we hover over the ticket in list view, the description appears, if we click on the ticket the description field is blank.  Help ! 

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