jQuery 1.1.1 often doesn't preserve white space.

I suggest the following variation to the clean method to preserve white space.

At the line 449 instead of:

var s = jQuery.trim(arg)

I put this:

var s = /^s+</.test(arg) ? jQuery.trim(arg) : arg

So, if arg is a tag string the value is trimmed but if it is pure text the value remains as is.