As mentioned a few months ago there has been a significant update to
the design and layout of printed articles.  This impacts both
PDF's created from the "Download as PDF" feature and from printing
directly from the web browser.
The feedback and discussion have been incredibly helpful. The team is
now ready to enable these styles as default across all projects. The
deployment is scheduled for Monday, October 9th. If you have used the
feature recently, not much has changed. If you haven't used it
recently we encourage you to check out the new styles. A few features:
* New layout to reduce paper usage
* Clear printing of tables and infoboxes
* Better headings
* Project-specific branding
For more information, please visit the project page on MediaWiki.org.
Comments and feedback can be left on the talk page there.