Walk-Behind Mowers

I have a newly purchased Husqvarna 5521P walk behind mower which is leaking fuel; I have to refill the fuel tank every time I get ready to use it.  Today I noticed gasoline odor in my garage after using the mower last night.  I discovered the odor was coming from the mower.  There is fuel on the mower deck and dripping from the air filter case; the air filter is saturated.  I checked the fuel line connections and there does not appear to be any leaks.

I have been folding down the handle when I store the mower each week, and the throttle/clutch handle may have been depressed during storage.  I'm not sure if this has anything to do with the fuel leak.

I appreciate any suggestions you have before I take the mower back to the retailer.