[Boofo]

Here you go.

NOTE: You need to have Firefdly's Users browsing this thread hack installed.

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In showthread.php:
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After this:
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if ($showforumusers) {
	$datecut = $ourtimenow - $cookietimeout;
	$browsers = '';
	$comma = '';

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Add this:
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$usercount = 0;

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After this:
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} else {
				$invisibleuser = '';
     		}
			eval("\$browsers .= \"".$comma.gettemplate('forumdisplay_loggedinuser')."\";");
			$comma = ', ';

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Add this:
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$usercount++;

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Before this:
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eval("\$browsers .= \"".$comma.gettemplate('forumdisplay_loggedinuser')."\";");

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Add this
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$usercount++;

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After this:
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if ($browsers) {

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Add this:
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		$s = 's';
    if (intval($usercount) < 1) {
            $usercount = 0;
        }
        if (intval($usercount) == 1) {
            $s = '';
        }

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In the "showthread_browsing" template:
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Replace the contents with this:
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<br>(<b>$usercount</b> User$s Browsing this Thread: $browsers)