We recently upgraded to Google Maps API version 3. This version has a lots of advantages for access over mobile devices, and offers general performance improvements.
Unfortunately the new version also comes with some quirks around printing. Apparently some browsers will require you enable the “Print background colors and images” in order to print properly. If you are having difficulty printing maps in BatchGeo try turning on this option in your browser.
This appears to be a known issue with Google Maps Version 3. The only solution I have found is to try browsers other than Internet Explorer, such as Firefox or Chrome.