The width of #wdn_search_form is 170px. I'm going to take another look at this layout though. I'll keep you posted.

The vertical alignment of the input (top: -2px) looks good in Chrome, but not as good in Firefox (top: 0 looks better). I'll split the difference and make it -1px. The desktop search needs to be redesigned, but we wanted to get the mobile search updated quickly as its flaws were more egregious.