There is no proof that the shutters were jemmied.
As to abduction...JS evidence of that.
Exactly Stephen, and that is the whole point of my previous post. If the McCanns did open the window/shutters as part of a plan to convince the police that intruders had broken in - then common sense alone dictates that they would have 'created' some evidence of that themselves. They would both have to be as thick as two planks not to realise how important that was. For instance - it wouldn't be difficult for them to put a few marks on the outside window cill or even the wall beneath it from inside the bedroom if necessary. Also the one thing they would not do is leave any of their own fingerprints on the window.
But we are being asked to believe that they did nothing - and simply decided to open the window/shutters themselves and then claim they had been forced open from the outside - knowing full well that no evidence whatsoever of their claim would be found on inspection by the police. Duh?
Why even bother with such a 'doomed' scheme involving the window/shutters at all - when all they had to do was claim that an intruder must have entered through the patio doors - which would also strengthen their claim that they had been targetted and watched for several days beforehand and so the perpetrator would know they were leaving the patio doors unlocked. Simples.
IMO Kate found the window/shutters open when she returned but it simply did not occur to her that they had been opened from the inside by the intruder(s). And there is no credible reason why she should have thought any differently in those first moments after finding Madeleine gone. Anyone would think the same.