The Top bar for Ask Ubuntu (and Meta) doesn't seem to have enough space from the top of the window area. When a notification (badge, welcome/faq) etc appears, it is very close to the text. This seems different to all the other SE sites...The other sites have it nicely aligned with the Search box.
Personally, the Ask Ubuntu site is one of the best styled sites of all of them, just needs this bit fixed up. Here's the Chrome user agent in case it's not like this for everyone...
Google Chrome 9.0.597.107 (Official Build 75357) WebKit 534.13 V8 2.5.9.15 User Agent Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Here are the screenshots of how it looks...
EDIT
Added in a screenshot of the same problem happening for me in IE8 on Windows XP