Yeah, it's totally a big thing with adventists. The only one that I think I've heard widespread biblical and doctrinal support for is that no one is supposed to wear jewelry. Supposedly the origin of this is when the children of israel melted their jewelry in the dessert to create a golden calf to worship when Moses had been up on the mountain talking with god for too long and they started to lose faith. The church even came out with a statement about a decade ago saying that wearing a wedding ring because of the cultural significance was alright but only a simple gold band with no stones or unnecessary adornment was acceptable. The 'dress code' so to speak was less formally documented but most certainly enforced by snide remarks and raised eyebrows.

These principals extend to the admonition of dancing because of it's sexual and seductive qualities (some of the main reason's I like to dance) as well as to the admonition of 'idols' of any sort in the church. You won't find a statue of any kind or even a cross represented in most adventist churches.