Comment 77 for bug 861268

Just this Friday I got around to testing compiz 0.9.8.6 on Gentoo (mesa upgrades did not help), and it fixes this bug for me. Unfortunately 0.9.8 on Gentoo has issues with several plugins not working correctly (e.g. place windows not working at all, all windows open at top left corner), so I'll have to revert to 0.8.8 as it works correctly with the indirect rendering option (which 0.9.8 no longer appears to have).

BTW, this is what I use after login to check whether the bug has gone away. I have xterm with white background and visual bell, and a fast(ish) key repeat rate. I open xterm and hold a key to produce ~20 characters. then I hold the left key to go to the start of the line and the visual bell flashes the background black a couple of times. Then I hold the right key to go to the end of the line, and it is on this return trip that the block cursor leaves black boxes on some of the characters.