Please can you run 'gucharmap'. Select "Ubuntu Mono"; Search for U+2227, then right-click and see what font it is actually using for those characters on your specific machine.
Prompted by seeing a similar inversion report for FreeSerif:
http://lists.alioth.debian.org/pipermail/pkg-fonts-devel/2012-February/009593.html http://bugs.debian.org/659527
over U+2293 and U+2294.
Please can you run 'gucharmap'. Select "Ubuntu Mono"; Search for U+2227, then right-click and see what font it is actually using for those characters on your specific machine.
Prompted by seeing a similar inversion report for FreeSerif:
http:// lists.alioth. debian. org/pipermail/ pkg-fonts- devel/2012- February/ 009593. html bugs.debian. org/659527
http://
over U+2293 and U+2294.