After the Firefox update the Border Image doesn't show up anymore at all? You might have defined somthing like this:
border-width:30px;
-moz-border-image: url('border.png') 64 64 64 64 stretch stretch;
-webkit-border-image: url('border.png') 64 64 64 64 stretch stretch;
-o-border-image: url('border.png') 64 64 64 64 stretch stretch;
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