Thank you for your post, and I apologize for the late reply.
I am unable to reproduce the problem on my Mac running FileMaker Pro 11.0v4 and Mac OS X Lion 10.7.1. I created a simple table with two records, created a bar chart, and printed to PDF, and also used Save/Send Records As -> PDF... Either way, a PDF file is created that includes the Bar chart.
Let me know what I'm doing differently than you so I can reproduce the problem.