When you try to open a Locked Beacon, the text will read:
"container.beacon is locked!"
instead of:
"Beacon is locked!"
Linked issues
is duplicated by 1
Comments 5
It's fixed.
No longer an issue.
Is this still a concern in the current Minecraft version 14w19a / Launcher version 1.3.11 or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Can no longer assign 14w08a as the fix version, but I can confirm that it is indeed fixed.
Fixed in 14w08a