YUI Library

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We introduced a regression in 2.2.1 in the Dom component which caused this
error. That bug is now fixed and will be released in a patch planned for
this week.

Regards,
Eric

I found that in :

YAHOO.widget.ColumnEditor.prototype.moveContainerTo

Commenting this 'workwaround' works around this problem

// Workaround getXY scroll bug for FF and SF
if(window.scrollX !== undefined) {
x += window.scrollX;
}
if(window.scrollY !== undefined) {
y += window.scrollY;
}