The most common problems are documented in the FAQ. This is the first place to check.
Pybliographer is developed as an Open-Source project. You are welcome to send your feedback (problems, whishes, solutions,...) to the following places:
the Mailing lists are useful for general questions and inquiries.
there is an IRC channel where you can discuss your problems and ask for help. It is often not very populated, though.
if you are certain that you found a bug, please post it in the defect tracking database.