First off, I really like this plug-in. THe issue I am running into is that on one of my pages, am getting an error that is specific to a different page.
To make this clearer, lets call them Page A and Page B. On page A, I have some custom fields, one called 'Title'. When you submit the comment without a title being typed in, the error is triggered.
On Page B there are a different set of custom fields, but the 'Title' field does not exist, but when you click submit, the same error is triggered, looking for the title.
The custom fields as well as all the functions that add the meta, preprocess the comment, etc. are controlled through separate plugins that only work if is_page(A) (and is_page(B)) are true.
Hope you can help!