[mr e]

are you sure the html for the bg is correct?

try this for the code in showthread.php

above this

PHP Code:

eval("dooutput(\"".gettemplate("showpost")."\");"); 


put this

PHP Code:

    // Generate randomness
    $num = rand(1,4); //make max number the number of images you have

    //output background
    $qrback = "{imagesfolders}/qrback$num.jpg"; 


haven't tested it, but try that and make sure the html is correct