Fixed constraint center calculation. Much smarter to do it when calculating transformation center...

Fixed Extrude constraint. Needed to premul the normal by the object's matrix to but it in global space.

Also, moved the Locking Axis modifier (for constraints) from Alt to Shift. Alt was conflicting with middle mouse button emulation (reported in the test builds forum).

Tilt Transformation.

source/blender/src/editmesh_tools.c

@@ -568,8 +568,11 @@ void extrude_mesh(void)
 			Transform(TFM_SHRINKFATTEN);
 		}
 		else {
-			if(transmode=='n') 
+			if(transmode=='n') {
+				Mat4MulVecfl(G.obedit->obmat, nor);
+				VecSubf(nor, nor, G.obedit->obmat[3]);
 				BIF_setSingleAxisConstraint(nor);
+			}
 			Transform(TFM_TRANSLATION);
 		}
 #else