The attached (very short) html page renders with a 2 pixel border on 3 sides, and 1 pixel border on the 4th, instead of a 1 pixel border all the way around as expected. Filing here because I don't know the relationship of our releases to official upstream releases. $ rpm -q mozilla mozilla-1.0.1-24 (The bug was said to occur for "mozilla-1.0.0-5.ximian.1" as well, but not for "mozilla-1.0.0-0_xft", which makes little sense to me.)
Created attachment 74424 [details] HTML page demonstrating problem
I wonder if this is a rounding error of some kind. In the DOM inspector I see: border-bottom-width: 1.42857px. My first nieve guess would be that this is a rounding error. If the ximian folks are blindly using keith's patch, which they might be, it computes DPI using a different method which would account for the difference.
https://bugzilla.mozilla.org/show_bug.cgi?id=206631