Is the id attribute required for <div data-role="page"> when using the Single Page Template?

Is the id attribute required for <div data-role="page"> when using the Single Page Template?

I am currently using the single page template system (one div data-role="page") per page on my site, and I have not been specifying id attributes for each page.  Should I be doing this? When I was reading the documentation, it seemed like it was only necessary for multi-page templates.  I'm seeing some odd behavior when binding to the pageinit event and was wondering if omitting the id attribute is the reason why.