Shared components used by Firefox and other Mozilla software, including handling of Web content; Gecko, HTML, CSS, layout, DOM, scripts, images, networking, etc. Issues with web page layout probably go here, while Firefox user interface issues belong in the Firefox product. (More info)
Created attachment 8838380[details]
See attached testcase.
The problem is that we're not properly restyling the ::-moz-table pseudo so it's not picking up the new inherited value of border-spacing.