Some note critics of those that publish classified information are hypocritical for not doing the same to others who published such information pursuant to an administration leak. This criticism has a sorta point -- if I anonymous leak private information that would otherwise be the sort of thing not for public view, it is not akin to someone else publishing somewhat similar information because "hey someone else did it too." In effect, it is an authorized leak, a leak deemed safe for public consumption. The other sorts of leaks often come from people inside as well, but has not "official" sanction. There is a difference there.
It is one of limited merit. First, in various cases, it is dubious if even the President of the United States can selectively leak classified information, especially if certain procedures are not followed. This is surely the case with certain types of information, which is especially secured, but there is a general rule as well. Second, selectively leaking information has negative effects, especially if the reasons are dubious. It sets up a false picture, only a partially view of the facts. Finally, in various situations, just because it is "official" does not mean the leaking is safe. The false picture in itself can cause problems (like going to war on false pretenses) while some of the information itself possibly is dangerous (Plame). Not to be selectively leaked, to some favored reporters, for not always benign reasons.
Justice Stewart in the Pentagon Papers case was but one person concerned with the overclassification of information, something people more expert in the field than he have said is a serious problem. We have a free press in part to guard against the government causing harm by hiding information from us needlessly and/or that can possibly can severely affect the public welfare. We also trust the press, as we trust each other, with freedom knowing that there is some possibly of missteps, some error and potential for harm. But, we take the risk. That is the bottom line, and let's not confuse things by making the claim that all leaks are equal.
It is sometimes important to be a tad careful with our criticisms, which are readily available to a degree that carelessness is not necessary. I am a bit concerned when this happens, since it opens up the path to annoying replies that really have no leg to stand on, but with a shred of truth to them. This can be enough to change the subject, which is self-defeating.
Even if this is not such a case, it is something to watch out for. It is especially tedious on message boards where the need to actually describe something can be a killer. Soundbites can get ya.