What browser is this? Have you tried a full cache-clear and forced reload? Does it happen on all pages all the time, or only on the commits page? Do you see the same issues when using a different browser?
Yesterday, when this happened, I emptied the cache and tried with a different browser, all in vain.
Today, I was just checking and the bug just disappeared, everything just looks fine right now, except for one little detail : in the search field (the one with the placeholder 'Find commits'), there are two magnifying glasses.