[squid-users] (null):// instead of http://, what would cause this?

I have a reverse proxy running 3.1.10, and noticed a few odd lines in the access log while searching them for some other info. I was wondering if anyone knew what would cause some entries like these? There are only 13 lines out of 22,000+ requests to this server today, and I haven't heard any complaints from users, just thought the entries were odd.

1297353864.628 0 10.200.129.50 NONE/400 3030 GET (null)://<...snip...> - NONE/- text/htm

The clients are on WAN connections of various speeds, and these could just be simply caused by network errors on the WAN connections, just thought I would check and see if any else had seen these and if it's something that I should investigate further in case there is an application issue causing this.

Thanks,
     Dean Weimer
     Network Administrator
     Orscheln Management Co
Received on Thu Feb 10 2011 - 20:38:37 MST