The code generated automatically by HCL uses a comment tag for the copyright where it begins with the commented text "BEGIN" and "END". In phpBB, this is interpreted as a command to the software and the page basically goes haywire. In my case, it 'lost' the CSS and other javascripts on the page and skipped the overall_header.tpl file completely.
I removed the BEGIN and END and the code works good on phpBB now.
Not exactly a bug, but an integration quirk.
It's not really needed in any case, 'tho I like to have a helpcenter comment to find the blasted thing when it gets buried in a template.
