col-md-12

[Gorash]

col-md-12 don't have the css attribute float:left like others columns.
The behavior is different (margin, padding, position ...)

[shahariaazam]

@Gorash all *-*-12 doesn't need float:left; It takes full the width of that row. And whenever you will put any div with *-*-1~11 then automatically they will place as float:left. That's why float:left is not necessary for *-*-12 grid class.

[Gorash]

Indeed, but for margin, padding, clear, position... it's not the same behavior.

Eg. if we change the class --12 into --11 in javascript, vertical position will change if the tag (and the previous and/or next tag) had a margin/padding.

[ideajunction]

I've recreated another problem this difference caused for me, it stopped form elements being selectable: http://jsfiddle.net/francisbooth/keLYk/2/

[cvrebert]

Duplicate of #10152. Please search next time.