In /skin/common_files/modules/reCAPTCHA/reCAPTCHA_js.tpl
This line can be commented out, as it's not really necessary and might interfere...
Code:
{if $main eq "catalog" && $cat eq "0"}{else}<noscript><meta http-equiv="refresh" content="0.0;url=home.php"></noscript>{/if}