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So I modeled a sword in blender and now I want to apply an UV map to it but I get a problem...
It won't let me unwrap (Yeah I wanna unwap with it all selected) because it says that the scale aint right
here is a screenshot
http://img209.imageshack.us/img209/6204/31401368.png
You scaled down your model in object mode rather then in edit mode.
It ususally doesnt cause a problem but I guess it does in Blender 2.6x+ (I just found this out recently). Simply go to object mode (tab) and scale it by the inverse of what you scaled it prior to modeling). EG, you scale it by .2, scale it up by 5 and it will become 1 again. After that just go in edit mode (tab) and scale it by .2 again. It will be fixed.
I managed to fix it, Ctrl+a in object mode and the /scale