Alpha = 0, well, ISN'T

1

Can anyone look at my www.costuragroup.com site on a Mac AND on a PC? Things look normal on the Mac, but when I test it on the PC, for instance, you see a crappy color box at the end of the signature that you don’t see on the Mac. I’m getting really sick of having to do a lot of workarounds when I see that _alpha = 0 to 100 fade-ins don’t LOOK transparent at the start. I’m wondering if this is some kind of stupid color issue. Thanks.