Mateus Gomes

I've been having issues with this in pretty much every world I have. Like Thomas said, I can confirm that after the chunk is defect for an unknown reason it may reset every time it is re-loaded. It reverts to it's previous state even though all other chunks surrounding it have maintained their latest data. My first guess of the cause was having a fast clock running somewhere in the world that would somehow delay chunk saves, but now I see that must not be the case.
I really hope this gets fixed, because it is not rare. It is a very big threat for both survival worlds and creative builds.

Actually, no. I checked and in 14w05b this happens as well. I'll edit this once I see where it really origins from.

Maybe I didn't specify. When you open your survival tab, the items don't show up on it. The items you just picked up, before you had opened it.

Edit: Description has been updated.

What I think the "issue" is is the fact that the way how the book is written is still the same as the signs, and you can't, and shouldn't, be able to edit much on a sign, since it has only four lines.
What I think would improve the writing a lot is if you could do things like: "Pressing Ctrl+A will select the whole page." or "Pressing Ctrl and the Left/Right Arrow will select everything the cursor passes though." because this happens with commands, and it's really handy.