I was able to collect the little floaty XP and quoins in the tutorial but now that I am in the "real world" I can't collect any of them. I first noticed this while up a tree in Hechey Track. I'm using Chrome 7.0.517.44
Are there counters for collecting floating XP, mood, etc?
I was in Groddle Forest Junction (I think) - I could go up in the trees and collect lots, and they would keep reappearing and I would collect lots more.
Later on I found I couldn't pick them up there, or anywhere.
Those objects are called quoins and you have a limit on how many you can get in a day, like Soap Bubble said. We don't do a good job of displaying your daily quoin limit, unfortunately, and we're looking at that, but the behavior itself is working as intended, so hopefully this helps.