I'm currently involved in an apartment search in Vancouver, which means I'm adding contacts pretty quickly and updating them several times a day with more info. Unfortunately the title says it all. People I add to address book are disappearing, people I change are reverting to the old version, and one person ended up being doubled as I added him again after he disappeared -- then he reappeared! What's the deal? Anyone else experiencing this? Are these jitters due to the high load on MobileMe, or has Steve shipped a not-ready-for-primetime product?