I have the same issue. Invisible chests, or sometimes they just go a strange messes up texture. The same thing happens with animals . I have to keep clearing my cache to re-fix the issue, and just prey that it wont kick in for a while.... The strange thing is the issue is the same if you are:
- not using a texture pack
-swap texture packs after noticiing the issue.
I had thought using a diff text pack might actually solve the issue but i guess not.
Running oracles version of java (7) from webupd8 team ppa with ubuntu 12.04 LTS (unity)
I think pressing f11 to fullscreen the application can be 'triggering' the issue but cant confirm.