Created attachment 283872 [details] testcase Steps to reproduce: 1. Load the testcase. 2. Zoom in (Mac: Ctrl+mousewheel with Cmd+Alt+\ to turn off smoothing) so you can see pixels. 3. Reload while watching the table cell just beyond the last one that has black pixels. Result: the antialiasing pixels sometimes appear and sometimes don't appear. If they don't appear, they remain missing when you scroll down. Using the text-rendering property doesn't make the bug go away.