Can't Access Command Blocks

This only seems to be an issue with worlds created prior to the beta. Newly generated worlds allow command block access.

Is the player an operator? is the player that in Gamemode 1? If no to any of those two this is working as intended

Please check whether you have operator status in the new worlds, and report back.

I left the beta a few days ago, so I can't check. Sorry.

Unopped people cant access command blocks

Players need to be opped in order to access command blocks.

Testing in 1.2.0.31 - players could access command blocks when opped, even when the default player permission level was 'Member'.