I run an Apache web server (hosting the folding sigs among other things) and I've been getting some weird referrers in the logs lately. Many of the referrers are normal, like http://forum.osnn.net/showthread.php and so on, but some of them show up as XXXX:++++++++. The number of + varies from just a few to about 30 or so. Anybody know what this is? When I searched for it I noticed (apart from all the pr0n sites) that I wasn't the only one getting these in the logs.