[reebosak]

this won't solve the big picture problem, but adding a quick check to unserialize if needed may be a good work around specific to this plugin to make it work universally. i just added a ternary check to my previously modified code:

if (preg_match('#(' . $vbulletin->wol_spiders['spiderstring'] . ')#si', USER_AGENT, $agent))
		{
			$agent = strtolower($agent[1]);
			if(is_string($vbulletin->wol_spiders)){
			$wol_spiders = is_string($vbulletin->wol_spiders)?
				unserialize($vbulletin->wol_spiders)
				:$vbulletin->wol_spiders;
            $u_agent = $wol_spiders['agents'][$agent];
            
			if (false && !empty($u_agent['lookup']))
			{
				$ourip = ip2long($host);
				foreach ($u_agent['lookup'] AS $key => $ip)
				{
					if ($ip['startip'] AND $ip['endip'])
					{
						if ($ourip >= $ip['startip'] AND $ourip <= $ip['endip'])
						{
							$spidername = $u_agent['name'];
						}
					}
					else if ($ip['startip'] == $ourip)
					{
						$spidername = $u_agent['name'];
					}
				}
			}
			else
			{
				$spidername = $u_agent['name'];
			}
		}