[Dygear]

Steve, they where never in the postbit.css file, they are called postbit and postbit_legacy. Editing these two in your admin panel will allow you to add the fields back.

Also:

<if condition="$post['field5']"><div>$post[field5]</div></if>
<if condition="$post['field8']"><div>$post[field8]</div></if>
<if condition="$post['field6']"><div>$post[field6]</div></if>
<if condition="$post['field7']"><div>$post[field7]</div></if>
<if condition="$post['field3']"><div>$post[field3]</div></if>

Is no longer correct, and you can just follow the answer found here.