line spacing in float captions too narrow?

Using a recent skeleton, the line spacing in float captions looks very/too narrow to me. Consider the tiny distance between the `g` and the `M` in the following example:

![unbenannt](https://user-images.githubusercontent.com/4593031/28456512-dfdb9546-6e02-11e7-82f2-26029c1bac6d.PNG)


