Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_4 like Mac OS X; en-gb) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8K2 Safari/6533.18.5)
I have a 2008 13" alu MacBook 2.4, and a 2010 13" MacBook pro 2.4 - two very similar systems. I upgraded both to lion, and see this problem only on the 2010. My router is a time capsule. I have reported the bug to apple, and I'm just assuming a fix will come in 10.7.1.