[Spinball]

I noticed I was getting style warnings - 1 for each post in showthread.
I narrowed the problem down to this Thank you mod.
It exists in the postbit_display_complete plugin:

if (can_thank_this_post($post, $thread['isdeleted']) && !thanked_already($post))
{
$display_thanks_image = '';
}

should be

if (can_thank_this_post($post, $thread['isdeleted']) && !thanked_already($post))
{
$display_thanks_image = 'inline';
}

Having no value after display: throws up a warning error (in Firefox).
inline is the default which should be used to display the button normally.