When hovering over questions on the front page (either on the main page or on meta), there is an underline associated with the hyperlink that extends across the entire question block (when viewed under Chrome 47.0.2526.106 m):
Here's the same view under Firefox (43.0.1) where the underline only spans the question title width:
This does not appear to be the case with other sites on the network (tested on Meta.SE and SO).