Net force on a Halbach Array in a uniform magnetic field

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A Halbach Array of permanent magnets does not experience a net force in a uniform magnetic field without motion. Only magnetic monopoles, which have not been observed, would experience a net force in such conditions. A classic compass needle, being a dipole, experiences torque rather than a net force in a uniform magnetic field. This torque causes rotation but does not accelerate the center of mass. Therefore, the discussion confirms that a Halbach Array remains unaffected by net forces in a static uniform magnetic field.
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I have been unable to determine whether a Halbach Array of permanent magnets would experience a net force in a uniform magnetic field.
 
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Without motion, the only thing that experiences a net force in a uniform magnetic field would be magnetic monopoles, and they haven't been observed (as free particles) yet.
 
Is that true? How about the classic compass needle? It's a normal dipole and it experiences a rotational force in a (to a first degree) uniform field.
 
It is only torque, it is not a net force (that would accelerate the center of mass).
 

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