I have got the same problens...anyone discovered what it is ? I have put it eveywhere.. the code may have a problem inside ?
quote name='homewetbar' date='Aug 20 2007, 07:20 PM' post='1124956']
I've got an extremely modified store so it's hard for me to tell you exactly what point in the code you should put the matching cross sell code if it does not work for you in the default area, but I poped my code in the instructions into jEdit to check and the code itself does not have any errors according to jEdit.
Backup your file and try moving it around in the product_info.php and see what happens. It's not going to do any harm, worst case it won't work, then try it in another spot and so on and so on. Then please post what you find and where you actually get it to work for others to see in the forum.