Hello everybody! Here's a bug. Not really bad, just sort of annoying.
Picture:
Explanation: (MacBook Air, latest version/operating system, in full-screened safari). I dragged a block into a script (In this case: Say () for () secs) into a previously made script which hasn't had the bug happen to it before (It doesn't work if you've done the bug on the script before). It duplicates the block above it, and hides the block you dragged in behind the script. I can't think of anything else to add, but if you need anything more, just ask for more.

Happened to me too! And then the block behind wont unstick. Happened on IE 10.

Unable to confirm.

safari 6.0.2 on macbook air 10.8.2

I see this kind of thing happen with custom blocks - it's very easy to replicate:

1. create a new custom block
2. join a few random blocks underneath it
3. drag all the blocks from just *under* the custom header cap block into the backpack

What happens next is that the dragged blocks appear in your backpack, but the original blocks ‘snap back’ onto the custom block header.
But now try messing around with those blocks that have just snapped back…
And try dragging more blocks to join onto the bottom of the script - you'll find they can only snap onto the cap header block, so it looks just like in the picture above.

Essentially, all the blocks that you dragged from below the header block are no longer there - but they still *appear* to be there.

ISTR that if you close the project, and then go back and reload it, they really are gone.

Does that help make sense of the original post?

However, I've never managed to get it to happen to anything but a custom header block, so I'm wondering what was done above to make the same thing happen to “when GF clicked”…

BTW, if anyone on ST happens to notice this, it'd be a useful bug to squish!

Okay, I've noticed this happens a lot with blocks from the “Looks” category, so I'm going to see if I can do it with anything else.
Edit: Never mind, it happened with a motion block: