I'll open a ticket and gladly give you access to my test installation if it will help you, Stuart. Just been a bit busy with work today and haven't had a chance to set things up.
Edited to Add:
Opened a ticket.
http://ipb.silvesterwebdesigns.com/tracker/issue-396-error-in-formphp-on-line-110-when-submitting-feedback/?view=findpost&p=1054