[quote name='Crimsonking' post='1302425' date='Apr 6 2008, 04.34']Even without the horn, there are hints that the Wall is crumbling. The magic keeping the Wall together is weakening. In ASOS, Jon witnesses a huge chunk of wall fall apart which resulted in a team of wildling climbers get killed. In the last sentence of the last Brans chapter, Bran notices a drop of water hit his face like "a tear." This means something...[/quote]
That means you didn't read carefully.Bran passed through weirwood gate,not through Wall(literally).And face in weirwood dropped something that seemed like a tear to him.
As for other thing,yes,part of wall colapsed,but it was warm day,ice melted and climbers vere ''disturbing'' entire construction by nailing those things in Wall.And I didn't catch anywhere that magic is weaking,it's actually getting stronger,thanks to dragons.So if you could provide a quote I'd appreciate :)