I mean, all links that are bold and when you hover over them they became normal. They are shaking and moving in all directions.. Since bold text takes more space, sometimes a topic title is wraped into two lines.. when you hover it, it skrinks to one line.. sometimes escaping your mouse "hand" like it's fearing the click

It's better to apply another style, like having bold links in both states, just adding "a.hover {text-decoration: underline} for instance. Otherwise it affects the whole layout. Even tables are shrinking when you hover the different columns' headings.