[kube]

On a default install of 4.1.9 and if we were to remove featured products and have only text on the home page. Then we cleared all the contents from head.tpl we should see that the width goes to...

leftcolumnwidth + rightcolumnwidth + longest word from main column

Hope this helps.

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Edit: Ooops double post. I knew I posted already but didn't see it on refresh d'oh!