This is a rather weird encountering.
When I check the page source code of my wordpress site today, I found quotemakrs generally missing for a lot of attributes:
as we know, there should be a pair of quotemarks to include the parameter after the equal mark, say name="description".
I don't find any abnormality on another of my site using the same theme but not hosted on Dreamhost.
If anyone encounters the same problem with me? Is this because of using Mod-Pagespeed?