The near-100,000 Australian and New Zealand expatriates in the US are up in arms at attempts to deprive them of their beloved Vegemite, a vegetable spread vaguely analogous, sources suggest, to Marmite. Vegemite has fallen foul of an obscure US dietary law that bans folate, one of its ingredients, from anything other than bread and cereals. Like British expats smuggling in Earl Grey tea, Aussies and Kiwis have circumvented the ban by bringing in supplies from visits home. But they are now finding, according to reports in the Australian press, that these shipments are being blocked at the border by over-zealous US officials