.block .top-corners{background:url(left_corner_top.gif) left top no-repeat;}
.block .top-corners div{background:url(right_corner_top) right top no-repeat; padding:0 7px; position:relative;}
.block .top-corners div div{background:url(block_bg.gif) left top repeat; height:7px; overflow:hidden;}
.block .content{background:url(block_bg.gif) left top repeat; padding:6px 6px 1px; position:relative; z-index:999;}
.block .bot-corners{background:url(left_corner_bottom.gif) left top no-repeat;}
.block .bot-corners div{background:url(right_corner_bottom.gif) right top no-repeat; padding:0 7px; position:relative;}
.block .bot-corners div div{background:url(block_bg.gif) left top repeat; height:7px; overflow:hidden;}
Taki mój klasyczny na szybko, ale nie wiem czy się sprawdzi przy tak małych rozmiarach