I've changed your 4.77 version to use lightsteelblue background with tahoma 10pt and blockquote background to lightyellow with courier new 9pt.Sorry. I'd love to take credit but it belongs to steveegg. I'd love to see what you're doing though. I suspect my color and wallpaper choices are a little lame. I'm just demonstrating the principles. I hope some others will come up with better visuals and let me know about them so I can post better ones for everyone.
I was trying to make the blockquotes stand out a little better by removing the color change. I opted for a border style just on the top and bottom. When I use the border statements (last three), I lose my font-family.A lot of times, it a tag is unknown or in some way broken, it will "eat" the one that follows. So, if NS4.77 choked on steelblue in BACKGROUND-COLOR, it might eat the FONT-FAMILY. As I understand it, the color names are now considered bad style and we're supposed to specify the colors directly.
DIV.body BLOCKQUOTE
{
BACKGROUND-COLOR: steelblue;
FONT-FAMILY: "courier new";
...
I got most of my coding ideas from the O'Reilly page I linked earlier and Netscape Developer, since I use Netscape almost exclusively at FR. Left, Right, Top, and Bottom Width tags are mentioned, so I gave them a try. But I'm thinking they are a buggy implementation.
I did try to move the order of the tags around, tried different values, etc, but I still didn't have any luck. So, even though having the top and bottom lines around a block quote looks fantastic to me, I think I may give up on it. Of course, this depends on what steveegg found.
Finally, steveegg, I did correct that "missing space" after the semi-colon in the border-style tag, but it didn't help.