I think you may be right about having something to do with carryovers.  I just removed mine and now my Form 1116 says "Form Not Required To Be Filed."  My carryovers are small and my total Foreign Tax Credit (FTC) is under $300, so I think it may have something to do with the carryovers and forcing submission of Form 1116 in the case of carryovers (even if otherwise Form 1116 is not necessary if the FTC is under $300/$600).   Hope they fix soon.