Board Thread:Support Requests - Designing Your Wikia/@comment-24036697-20150202032533/@comment-5939974-20150202054424

Hmm... could you try not using CSS, and instead just using a wider logo? That way you avoid the stress of measuring manually. Also the positioning parameters in CSS that are messing up your logo have the !important declaration on them, meaning I'm not sure if specifying another background-position element in your Monobook.css fixes anything.

Here, a blank-centered version (right-click, then choose Download for the real file). Upload that as and delete the #p-logo element in your Monobook.css. Then refresh your cache. Good luck.