Created attachment 275793 [details] HTML document which is a 2-column document that does not print correctly in Safari 9.1. When I go to print a multi-column page (in this particular case, a 2-column document), the Print Preview shows only one column. If I choose either "Open in PDF Preview", or "Save as PDF..." [on OS X 10.11, Safari version: 9.1 (11601.5.17.1)], the document is formatted as a single-column (1-column) document. In contrast, Chrome [Version 49.0.2623.110 (64-bit)] and Firefox (Version 42.0) get this right. The resulting preview and PDF is a 2-column document with correct column breaking (column flow) and correct page breaks when there is no room for another item in the second column of a page. Attached are the HTML source, and "Save as PDF..." output from the cited versions of Safari, Chrome, and Firefox. (It looks as though I'll need to attach the comparative outputs in subsequent comments.)
Created attachment 275795 [details] Safari's (incorrect, single-column) output when choosing "Save as PDF..." for the 2-column document
Created attachment 275796 [details] Chrome's correct output for "Save as PDF..."
Created attachment 275797 [details] Firefox's correct (with respect to column count) output for "Save as PDF..."
Just a typo correction: I wrote "Open in PDF Preview" when I meant "Open PDF in Preview".
<rdar://problem/25594228>
Duplicate of https://bugs.webkit.org/show_bug.cgi?id=15546
*** This bug has been marked as a duplicate of bug 15546 ***