Cyrillic (russian) small letter m (м) is incorrect

[denis111]

It must be vertically straight, not diagonal leftmost and rightmost (side/lateral) lines. Must be like м. Now it looks like subway logo (metro) :)

See fourth letter in this example http://www.opennet.ru/opennews/pics_base/0_1400928628.png

[iaon]

Disagree. Side lines shouldn't be vertically straight. It'll be style violation because capital latin M and capital russian М have diagonal lines. Small russian м should be similar, but I agree it looks not so good. I believe it should be corrected by another way (width/angles change)

[potch]

This is a stylistic decision by the designer, which we will stick with for the time being.

[ghost]

Just in case, I found no issue with м in Fira Sans (being a grumpy reader whose native language is Russian). Thanks for the fonts, by the way.