Excessive space between r and s when whitespace follows?

[nmsmith]

Is it just me, or do the trailing s's look detached from their word ("numbers") in the below image?

Note: This is with smart kerning turned on.

[eigilnikolajsen]

Good point, I'll have a look. Maybe r needs to moved more to the right. It is impossible to get correct spacing everywhere though, since some characters are narrow (like r, i, l, etc.)