looking at the PICAXE X2 product breifing it does not mention the Universal voltage X2 chips, (I am positive it always used to), perhaps the update has been accidentally reverted?
~Patrick
This thread announced the introduction of the universal voltage 28X2 and 40X2 in December 2010. The first post refers to a revised document but the document is now Revision 1.0. I'm sure that the doc used to be a later one but appears to have regressed.