Hi, In Lyx 1.5.1 (I'm using it for Linux, but I don't think it matters), whenever I write "/propto" at a math window, or select the symbol in the math panel, it show up on the screen the "\mu" symbol. However, if I export it to post script or pdf, it shows up normally in the document. It's a minor bug, but rather annoying.
Well, I guess this is it. Thanks for your dedication!