Also, a lot of teams are obscuring the severity of injuries that players are operating with. Plaxico Burress had torn ligaments in his ankle from week 1 of regular season last year, and we only found out about the true extent of the injury in spring OTAs this year. The Patriots and Titans routinely out-and-out lie on their injury reports (mostly by omitting reports, but also often by understating severity or intentionally mis-stating what caused a guy to miss practice - New England is notorious for covering up injuries). Oh, and Bill Parcells injury reports are notorious for being short because he simply doesn't tolerate injuries as excuses for not practicing/playing. But, if a guy is on a Bill Parcells injury report, you know that guy is really hurting.
Indianapolis goes the other direction, and reports every little ding and nick in a can't-see-the-forest-for-the-trees approach, routinely putting half the starters on the injury report. At least they are more honest than the liars (most players are fighting through some kind of bruise or ache on any given week).