Please use default files downloaded here as the suggestion by a user here is not correct.
Lets discuss how you get an issue.
I have a brand new vbgallery installed with
vb 3.7
http://www.reeftalk.com/vbag
You can use login testing and testing
I am not seeing any emails with query errors. I have registered 2 test users through the forum registration script and everything appears to be working and I am using the userinfo merge plugin
The only issue I show that was an issue with the plugin was this below and the downloadable code has been updated to reflect this change
http://www.photopost.com/forum/1224161-post2.html
You might want to download 2.4.3 and make sure you upload the file
/forums/includes/vbgallery/useradmin_update_data.php