[TigerC10]

That's not the "float container" you're talking about, I believe that's the selected tab's "subtab set". The float container is the drop down menu (for notifications and the like), is it not?

Anyway... The height of what you're talking about governed by the "line-height" property in the "advanced search" area. Edit the the vbulletin-chrome.css template and make the changes in red:

vbulletin-chrome.css

.navbar_advanced_search li a {
	text-decoration:none;
	font:{vb:stylevar navbar_font};
	/*line-height: {vb:stylevar navbar_tab_size.height}px;*/
	line-height: 26px;
}

All we're doing here is resetting the line-height to the default value of 26px rather than altering value to navbar_tab_size.height

@vbstaff - this might be considered a bug, as altering the line-height of the advanced search link (to be whatever navbar_tab_size.height is) moves the text of the whole subtab group down (which can sometimes be behind the drop down "notification-style" menus rather than being in their proper place above them). Either the line-height needs to be set relative to the font size of this subtab group or set to a static 26px so as not to interfere with drop down menus.