If you are using Snow-ExtL theme - in addition to the changes above:
look in qa-styles.css and find
.qa-a-item-main {
float:left;
width:610px;
display:inline-block;
padding-left:10px;
}
change to ........
.qa-a-item-main {
padding-left:10px;
}
If the best answer tick appears too high you can adjust its position .....
.qa-a-selection {
position: absolute;
left: 12px;
top: 85px;
width: 60px;
text-align: center;
}
change the top value - try 95px
Monty and Bex