This one is for 42 cents - it takes about 10 mins. - picture evaluation task (14 minutes) Requester: CrowdFlower
I had the same problem when I tried them earlier. The only way I do them now is to look at the website first, then accept, or possibly skip. There is a possibility of someone else getting your hit while you look I think, but I don't think that happens often. At least for me anyway.
Thanks! https://www.mturk.com/mturk/preview?groupId=2BVM4F0OHOVR9WN0BITLD2HNC1F23B .45 crowdflower iPhone user survey