did this happen after you updated to the so called 7.8.4 ?
try this..
your using postbit_legacy right
replace your post_thanks_postbit_info
with
Code:
<vb:if condition="$post['userid']">
<dt>{vb:rawphrase post_thanks_thanks}</dt> <dd>{vb:raw post.post_thanks_user_amount_formatted}</dd>
<vb:if condition="$post['post_thanks_thanked_times'] == 1">
<dd>{vb:rawphrase post_thanks_time_post}</dd>
<vb:elseif condition="$post['post_thanks_thanked_posts'] == 1" />
<dd>{vb:rawphrase post_thanks_times_post, {vb:raw post.post_thanks_thanked_times_formatted}}</dd>
<vb:else />
<dd>{vb:rawphrase post_thanks_times_posts, {vb:raw post.post_thanks_thanked_times_formatted}, {vb:raw post.post_thanks_thanked_posts_formatted}}</dd>
</vb:if>
</vb:if>