id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
9085	"<span class=""Apple-tab-span""> remove"	yiminghe		"Webkit-based browser generates 


{{{
<span class='Apple-tab-span' style='whitespace:pre'>         </span>
}}}


to show `tab` effect when pasted from somewhere(outlook).


Since ck will collapse extra whitespace except pre, it leaves:

{{{
<span class='Apple-tab-span' style='whitespace:pre'> </span>
}}}


So there is no reason keeping this span. see attachment patch.
"	Bug	closed	Normal		Core : Pasting	3.0	fixed	Safari