Ice Caps are Melting

In another article I found on my very-quickly-becoming-favorite news source, the BBC, they mention how quickly the icecaps are melting. Some people write this off as "hey, it happens." The warm before the ice age if you will. What do you think? Is this just naive, or are we speeding up nature's normal cycle? I have lots of information on the latter because there is no published data (read: scientific peer review articles) that denounces global warming, but feel free to tell me what you think. I would love to argue both sides of this!