OK to Use Both Balanced and RCA Inputs?

Looking at a photo of the rear panel of the VS115, on page 2 of this document, a jumper is indicated as being required on the XLR connectors (presumably between the inverted input signal on XLR pin 3 and ground on pin 1) when the RCA inputs are used. The significance of that is it indicates that the RCA and XLR inputs are not independent of each other, with the RCA input presumably being connected internally to the non-inverted input on XLR pin 2. It would therefore be undesirable sonically (and possibly even harmful to the preamp or CDP) to connect both at the same time. See this thread.

Regards,
-- Al

Thanks, Al, for the precise answer and the very relevant link.