Per discussion with dhyatt and Hixie in #webkit, we should be entering almost standards mode with an HTML 4.01 Transitional/Frameset public ID with an empty (but present (i.e., "")) system ID. That is to say both of these should be almost standards, and not quirks (as they are now): <!doctype html public "-//w3c//dtd html 4.01 transitional//en" ""> <!doctype html public "-//W3C//DTD HTML 4.01 Frameset//EN" "">
*** This bug has been marked as a duplicate of 17723 ***