A couple of interesting things from the Zogby release:

The wide-ranging poll also shows that 58% of those serving in country say the U.S. mission in Iraq is clear in their minds, while 42% said it is either somewhat or very unclear to them, that they have no understanding of it at all, or are unsure.

It's not entirely clear if the 85% figure mentioned above is a subset of the "clear in their minds" set or the entire survey group.

Also this:

The survey shows that most U.S. military personnel in-country have a clear sense of right and wrong when it comes to using banned weapons against the enemy, and in interrogation of prisoners...55% said it is not appropriate or standard military conduct to use harsh and threatening methods against insurgent prisoners in order to gain information of military value.

Good point on number 1, I noticed the contradiction. . . but didn't let it stop me!!!

#2 is indeed encouraging, though it means 45% don't agree, which is alot, and the question of what percentage of those 45% are closer to the day-to-day field action isn't in there.

Looking back it does appear to mean 85% of the whole set of troops.

Well it's still disturbingly large even if one does remove the "fuzzy on the details" set.

Re the harsh interrogation numbers, tough to say if this is encouraging or discouraging in the wake of Abu Ghraib. Certainly reflects the deliberately vague policy on torture enacted at the highest levels.

55% being against and 45% being neutral/in favour is not a "clear sense of right and wrong" (if one considers "using banned weapons against the enemy, and in interrogation of prisoners" to be wrong). It means that nearly half are liable to do it (that's no even accounting for people who merely answered they opposed it but don't believe it).

If 45% of police officers thought beating confessions out of suspects was ok (or not particularly not-ok), would that be a clear sense of right and wrong?

Technically, it is "most" but "most" begins at 50%+1. They present it as being good news. I can also try to pass off something bad as good news, watch: most (55%) athletes oppose taking steroids.
See? Clean group this is.