Hi Turt,

Today I found an issue with worldguard. I'll explain.

1. Go to creative.
2. Place a block like gold ore in a worldguard region.
3. Now make sure you don't have permission anymore to the region.
4. Go to survival and try to break the blocks.
5. It will say no permissions of course (necessary step).
6. Now either remove that region or get added to the region so you have permission.
7. You can now break all the blocks you tried to mine before and pick them up in survival.

Is this is a WG exclusive bug or can it be replicated with other plugins?

I think any plugin that protects blocks such as Towny but I am not sure.

Confirmed issue.

On build 507 this bug is still present. I just tried it exactly like in the OP and it worked.