Bukkit

What steps will reproduce the problem?
1. Place wool carpet infront of a chest with another transparent block above it (in my case a second chest on top)
2. Try to open the chest while on the side of the carpet
3. Get an error message about not being able to open chests you can't see

What is the expected output? What do you see instead?
  To be able to open the chest. An error message.

What version of the product are you using?
The latest build.

Do you have an error log of what happened?
Wouldn't really send an error to the server.

Please provide any additional information below.
So basically it counts wool carpet as a solid block and it think's I'm opening the chests through it, when infact I'm not.