Their Great Leader is getting his ass kicked on Social Security, someone in his Administration was enabling a prostitute to enter the White House under the cover of being a "journalist", the opposition, rather than being demoralized after the defeat in November, is more unified than at any time in the past, so what's a wing nut going to do? Why, of course, you revive the tactics (and target) of the discredited "Swift Boat Vets", and go after the defeated candidate from last time, John Kerry.
This time, the rumor you pursue is that he's trying to cover up the fact that he was dishonarably discharged from the military, and somehow got then-President Carter to set it aside. Depending on the reason he received such a discharge, that could prove to be devastating to any future Presidential run (of course, a dishonarable discharge because he later came out against the Vietnam War would probably improve his chances, especially if Tricky Dick's fingerprints were on it).
Is there any basis to the rumor they're trying to float? HELL NO !! A dishonarable discharge would have made it very difficult for him to be approved to practice law by the State Bar of Massachusetts in the mid-70's, but there is nothing in the record to suggest that happened. Since he was a public figure in the 1970's, there would have been people in the military who (a) signed off on the discharge; (b) hated Kerry, then and now; and (c) are still alive to talk about it. But no one has come forward to level such an accusation. In short, if he had been dishonorably discharged, there would be an overwhelming circumstantial case showing that (in much the same way there was an overwhelming circumstantial case that Bush blew off his Guard duty in 1972), and you certainly wouldn't need the former Presidential candidate to sign Form 180 to prove it.
There is also another group that has an interest in smearing Kerry by innuendo: his opponents within the Democratic Party for the 2008 nomination. Because of the tiny margin of defeat last time, Kerry, not HRC, not Edwards or Obama, is the presumptive frontrunner. A comfort level exists with him among Democrats, and if he can come within 2 1/2% of knocking off an incumbent with the country at war and not in a recession, he's a safe pick, a no brainer. To change that dynamic, look for one of Hillary's handpuppets, like Harold Ickes, to begin "raising questions" about his war record (Ickes has already hinted to reporters that Kerry's slow response during the campaign to the "Unfit for Command" cadre showed that he must have had something to hide) as a way to ratchet up the public pressure to drive him out of the race.