Referenced in the George VI study paper under the 2d 1947 Self-Government Set as :

"G.S.M (Jun 64): Mr Russell Bennett reported that he had been shown an example of this stamp with a paper fold variety. He stated, This is one of what was originally a strip of six with vertical paper fold which, when flattened out shows a broad line right across the stamp between the inscription MALTA and the portrait."

Above is my copy.. are there any more?

UPDATED :: 17-Apr-2010
Thank you to the 'MSC member' who submitted his two ! copies of the paper fold (below)
It's possible mine is the centre stamp to these two ; left is the next above mine ; right is the one below mine

Three more to find.. can anyone help further?