nicoleemma on "question about photo size in the blog"

Hi,
I wonder why most of the photo in my blog are displayed in a scaled size, eg
http://nicoleemma.files.wordpress.com/2010/09/dscn5333.jpg?w=300
I wonder if there is any setting I can get rid of the ?w=300 part and display with the default photo size?
Thanks!
Jinsong