It's obvious that “Your website URL” field in Silverstripe comment forms is a plum for spammers, so let's remove this field.
In current version of Silverstripe's Blog module it's impossible to show non-latin tags in Tag Cloud widget — you'll see garbage instead of them:
By default Silverstripe CMS doesn't have any means to place a custom javascript snippet at the very end of the head section just before "</head>" closing tag. I faced with this today because I wanted to put Google Analytics tracker code there. Of course, I know that technically one can place this code anywhere, but I had problems with my statistics and I wanted to be sure that I did everything as Google said.