display offset/not lined up

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http://crunchbang.org – Hey guys,new to linux and new to crunchbang, I just installed the latest version, "unstable" one as I couldn't get wifi working on the stable one, now I have Wifi working okay from the get-go but now my display is all messed up, everything is offset, the column of info and shortcut keys list is on the left hand side, like as though my screen starts an inch or so in from the left hand side of the screen then it finishes back on itself. its an Acer Aspire laptop with 2Gb NVIDIA Geforce GT630M, can someone guide me on how to fix it exactly please? what steps do I need to take to ma (HowTos)