The problem is that it keeps writing these strange characters at the beginning of each combined file. I guess it has something to do with encoding / BOM, because of the sequence  but I can’t figure it out. Here’s some sample output:

.selsort { background: #fef63b; border:1px solid #8aa5bf; margin-left:10px; } .selprod { background: #fef63b none repeat scroll 0 0; border:1px solid #8aa5bf; font-weight: bold; } #checklens { border-right:1px solid #000; border-left:1px solid #000; padding:0 10px; color: #000; font-weight: bold; } #checknew { border-right:1px solid #000; padding:0 10px 0 0; color: #000; font-weight: bold; } .color-n7 { height:1px; border-color: #f0e837; border-style:solid none; border-width:1px 0; clear:both; margin: 0 12px; } .new-line { clear: both; } .float-left { float:left; }.pre-gateway { margin:2px 5px;} #by { margin-right:-14px;} #by, .pre-gateway, .srch { float:right; } #adv {float:inherit; } .isrch {cursor:pointer;} #srch2, #srch3 {margin-right:20px} .checklens { border-right:1px solid #000; border-left:1px solid #000; padding:0 10px; color: #000; font-weight: bold; } .checknew { border-right:1px solid #000; padding:0 10px 0 0; color: #000; font-weight: bold; } #dvPgs { width:100%; height:100%; position:relative; display:none; text-align:center; vertical-align:middle; } 

Thanks in advanced