Okay this one has been driving me mad for ages now and I've finally had to submit to asking for help.
Photopost is installed at /gallery/
Vbulletin is installed at /forums/
Everything works correctly apart from one thing.
After clicking on reply to image, the newreply.php page is displayed.
Error: 'null' is null or not an object
However, if the user is logged in, they are presented with a 'Logged in as <username>' message which hrefs to '/gallery/member.php?u=<userid>' .
This doesn't appear to be the correct url, surely that should be '/forums/member.php?u=<userid>' ?
Where has this gone wrong?