Tracked down the apparent cause to libcairo's debian/patches/02-cairo-1.4.8-lcd-filter-2.dpatch.
The bug reveals itself if sub-pixel rendering is enabled and rgba_order 'VRGB' is selected.
$ gconftool-2 -a /desktop/gnome/font_rendering rgba_order = vrgb antialiasing = rgba dpi = 96 hinting = full
Changing it to any of the other options (vbgr, rgb, bgr) using
$ gconftool-2 -s /desktop/gnome/font_rendering/rgba_order -t string "vbgr"
and restarting Compiz (or disabling/re-enabling it) will clear the issue.
Working on a fix.
Tracked down the apparent cause to libcairo's debian/ patches/ 02-cairo- 1.4.8-lcd- filter- 2.dpatch.
The bug reveals itself if sub-pixel rendering is enabled and rgba_order 'VRGB' is selected.
$ gconftool-2 -a /desktop/ gnome/font_ rendering
rgba_order = vrgb
antialiasing = rgba
dpi = 96
hinting = full
Changing it to any of the other options (vbgr, rgb, bgr) using
$ gconftool-2 -s /desktop/ gnome/font_ rendering/ rgba_order -t string "vbgr"
and restarting Compiz (or disabling/ re-enabling it) will clear the issue.
Working on a fix.