http://www.nysun.com/article/3107
And it's very speculative. More a matter of implications than new facts.
For example, the author makes much of Kerry's discharge coming after consideration by a board of officers, which is not done for the usual discharge. However it is done for involuntary discharges. These could be other than honorable, but then could also be honorable. For example, in this case Kerry was a standby reservist. He wasn't doing anything and wasn't obligated to do anything. He was a drag on the system, IOW. They could have wanted to slim the ranks of the standby reserve, since it was a period of cutbacks.
Not too many years after Kerry's discharge, I found myself in the same situation, more or less. The Air Force asked me to either resign my commission or find a Selected (IE, drilling) Reserve position. If I had done neither, they could have discharged me involuntarily. In the event, I found a Selected Reserve IMA position, and lost about 100 pounds so I could take it. IIRC, I asked for an extension of their deadline so I could find the position (and lose the rest of the weight, which I had neglected to mention to them. ;) )