Darren,
Was the unit refurbed at all or was it a straight out of his in yours swap?
I'm just wondering why a H02 version is able to read SDHC as to the best of my knowledge VAG only put SDHC readers in H04 onwards and they were just disabled in the earlier firmwares.
Unless you were just lucky and that was put in by mistake. Either that or a lot of people with H03 or lower have been unlucky
What car did it come from?
Carl