Example:
Go to http://adblockplus.org/en/
Then block: http://adblockplus.org/images/75.png
Then whitelist: @@http://adblockplus.org/images/75.png
Then disable whitelist: @@http://adblockplus.org/images/75.png
Result: Disabled whitelist isn't present on the Blockable items list.
I was hoping we could have something like this:

tested with build:
Adblock Plus 1.0.0+ development build (2008122622)