Bill, is there any further information on replacement of flooring? I have a section on my H45DS that had "gotten soft" and am not sure what my options are in terms of replacement/repair.Grease? ;-)
Probably an indication that they are "getting soft" and you should start considering saving up to replace them.
I'd try pulling them and cleaning all the mating surfaces. Could just be dirt allowing the sole boards to flex and make noise. clean boards tend to "stick" in place