What are the known problems of creating PDF files using ABXPDF?

Caution:  It has been found that ABXPDF may create blank pages at the beginning and end of your document; this will not affect the review process of your application.  There is also a possibility that content could be lost in the conversion to PDF, which will affect the review process of you application.  If ABXPDF is your preferred PDF creation tool, please carefully review your PDF content before you submit.  You may want to consider choosing another PDF Writer to create your PDF Files; click here for additional options. 

USPTO FAQ - Questions and Answers (31AUG2006)