I have a 2008 G35S Sedan...when I open my trunk and it has rained water gets in. I've taken it to the dealer three times, they say it's normal because of body type. They've replaced rubber seal.

 

^ it is normal, applying bat overlays and covering the rubber seal has helped reduce mine a great deal, i believe the '10 has new longer rubber seals that fixes this issue(its the reverse light seals), so it should theoretically be a direct replacement if it really bothers you that much.

 

Thanks for the response! I will look into this. I just don't like things getting wet in my trunk.