Now that the dust has settled from the 1.5.0 release and there has been time for to it be "bashed around" a bit, a number of bugs have come to light. These have been addressed in this new 1.5.1 release which focuses solely on stabilisation.
I found the following
nPrevious.setAttribute( 'id', oSettings.sTableId+'_previous' );
nPrevious.setAttribute( 'id', oSettings.sTableId+'_previous' );
and should be:
nFirst.setAttribute( 'id', oSettings.sTableId+'_first' );
nPrevious.setAttribute( 'id', oSettings.sTableId+'_previous' );