Apparently a "wrong" version of the software was ditributed around the country containing a politically incorrect term ("spastic").
The new release date of the game has not yet been announced but we will keep you updated on developments.
This is the official word from Nintendo:
The above game was launched in the UK today. Unfortunately we have discovered that a small number of games contain the wrong version of the disk due to an assembly error. We have therefore decided to recall all copies of the game from UK retailers so that this mistake can be corrected.
We will re-launch Mario Party 8 in the UK as soon as possible and will announce a new launch date shortly. We very much regret any inconvenience caused.