I'm working with the latest version of Firefox 2, but the problem has existed as long as I've been working on the new site. I have to assume it's a problem with my CSS code.

Very briefly the problem is that I'm formatting tables with CSS and the "borders" separating cells in the table should be a single pixel wide, blue color. In Firefox I find that sometimes that single-pixel border just disappears--especially the vertical borders, but sometimes the horizontal borders as well. Scrolling the page vertically sometimes (but not always) makes the borders re-appear/disappear.

The width of the border is specified in pixels, not a percentage, so it shouldn't be a matter of a percentage number of the total width being rounded down to zero width.

In addition to Firefox I'm also testing with IE6, IE7, Opera, and Safari for Windows--but the bulk of my testing is in Firefox since that's what I used on a daily basis. As far as I know the problem has only been observed in Firefox.

Regards,
Craig Steiner