Guys,
This may or may not be an extension of the same issue.
Over the last three days I have, on occasion, had a phantom 'Collect All' appearing. That is to say, the button appears but with nothing available to pick up. The first time it drove me nuts looking for what had not been collected. I even decided to spend 5 Diamonds to pick it up and watch where it was but nothing other than the removal of 5 Diamonds occurred from my Diamond stockpile.
Upon refreshing, however, the Button was gone and my 5 Diamonds had reappeared on my stockpile so I left it at that.
Just now I had the same thing occur. I did a refresh and the button disappeared once again.
I'm playing in East Nagach on Google Chrome Version 38.0.2125.111 using Vista with everything up to date including Java.
Good luck with the bug guys.