Description of problem:

I had a table which was originally created with 4 columns. I added another column, but forgot to increment the column count up 1. The renderer in Pressgang rendered the table just fine.

Assembled book, however, had this error:
 ERROR: This topic has invalid Docbook XML. The Program Listing language is not a valid Publican language.

Topic ID 7858


Ideally, either it wouldn't render, or alternatively, the compiler error would be more helpful.