Last modified: 2012-11-01 16:56:42 UTC
Some skins such as Vector and Monobook have floatright and floatleft classes for floating div or table elements, but other skins such as Nostalgia don't. These classes are very convenient when making right- or left-aligned tables. Please implement them under all skins.
They should be moved to skins/common.css then.
Since 1.18 they are in common.css (r91340), although the margin is still set per-skin. Note that these classes are actually intended for images.
As Robin says, these are intended for images only, and may have some additional styles, making them unusable for tables or whatnot. The floating code is now in {commonContent,shared,oldshared}.css and in all core skins that do not use common, so I'm closing this as resolved.