The default font "UbuntuRegular" used by Ask Ubuntu is messed up on umlaut characters. Affected characters seem smaller than normal. I played around the font-size and it doesn't help with the problem.
This seems to happen with all umlaut characters like ÄäÖöÅåÜüÑñ and so on.
# cat /etc/issue Ubuntu 14.04.1 LTS \n \l
UbuntuRegular on Ask Ubuntu
Arial on Stack Overflow
Given that there are not too many posts with umlauts on AU this still looks very weird in running text, see the example.