Google introduced a custom print dialog to Chrome a few versions ago. This adds a step to saving a PDF or using any of the other standard options. Until recently, this could be disabled in chrome://flags/. They have since removed the flag, but they did leave the command line option to disable it.
A workaround is to create an AppleScript applet that launches Chrome with this option. The following script does exactly that, assuming Chrome is located in your applications folder:
do shell script "/Applications/Google\\ Chrome.app/Contents/MacOS/Google\\ Chrome --args --disable-print-preview > /dev/null 2>&1 &"
Mac OS X Hints
http://hints.macworld.com/article.php?story=20120806085905669