I can't help but think this post illustrates better than any other the 'failure to communicate.' I do indeed get the credibility issue, but I think perhaps we disagree on what the minutiae is, and what is really important.
I've seen dozens of posts here today on absolutely meaningless issues. What Amanda said about mops, what was the deal with the phone calls, who said what about sleeping in--none of that matters. Taking the most paranoid, twisted, and bizarre explanation of each you cannot change the fact that nothing on God's green earth can explain how they participated in the murder and left no trace of themselves or a clean-up.
Thus the true minutiae is that which has no bearing on whether Amanda and Raffaele actually murdered Meredith Kercher, like whether they slept in completely or someone got up to putz around on a computer and answer a phone call the next day. If 'credibility' is the issue, then the prosecution has earned itself a place in infamy. The longer this goes on, two appeals pending, the more likely Amanda Knox will take her place alongside Dred Scott, Captain Dreyfus, John Proctor, and other people otherwise unimportant yet whose suffering at the hands of an unjust court are still remembered.
They are already starting to make movies about it, and the outcome is yet in doubt. The end of the story is still up to the Italian system, and if they think Amanda and Raffaele's 'credibility' is in doubt because of these irrelevancies posted, then the final act will be the indictment of that system.