I'm wondering if its just be being on 2 hours of sleep or not, but when I woke up early this morning it seems my lock screen has a new pic. I've left it as the default, but I swear it wasn't the beach before. Its still a night time picture though
have you selected bing as the source of the pictures for your lock screen? I believe by default this is selected and it will change your picture every so often. You will have to manually select a picture you have as your lock screen if you want to have it there permanently.
I haven't changed anything to do with the lock screen since i've gotten the phone. I'm going to go ahead and assume that somehow i really wasn't paying attention for the 5 days that i've had my phone
If your beach photo is the moonlight beach with a shooting star, that is the default photo.