Wondering if this is just a bad coincidence...installed 10.7.4 on Friday. Same day, my upload bandwidth has suddenly dropped to zero. I've got Roadrunner wideband, and the download speed is still near 50 mbps, but the upload test just hangs and then gives me 0.08 mbps after like ten minutes. Even a simple photo upload to Facebook takes an hour, before it took seconds. Rebooted modem & router, tried direct ethernet from modem to the Macbook Pro, same issue. Ran ClamXav, no viruses. Called Time Warner (useless) and spoke to three techs, so escalating tomorrow with them. Any ideas? Wondering if this could have anything to do with the update, timing was about the same. Thanks for any help.