Thanks for posting this. I recently experienced the same conflict
between the Receipt Page link and Virtuemart's Relay Response URL. I did
disable both links as the default URL's by deleting the URL's but left
them in the list. I was getting a blank ...
I resolved this issue in my situation as follows: Checked the log errors
on the server and found the following:[Mon Aug 11 17:29:56 2014] [error]
[client 126.96.36.199] ModSecurity: Access denied with code 406 (phase
2). Operator EQ matched 0 at REQ...
I have also just experienced this same issue with the relay response
timig out. It was working, then all of a sudden it wasn't. My relay
response URL is to a root directory success.php file. Any thoughts on
how to troubleshoot. Nothing was changed on...