[Moo] Drag.Move doesn't "automatically" drag cloned element on IE7

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Hi all. We have the problem, described on mooforum
http://www.mooforum.net/help12/drag-move-doesn-automatically-drag-cloned-element-ie7-t2166.html

We can't drag images normally on IE7. Is this the mootools bug? Or
maybe there is a decision