When viewing an image at its attachment page, the image is shown as a medium size, instead of being scaled to fit the content space. Why is this, and where should I look to change this?
Example: http://christiaanconover.com/?attachment_id=4025
HTML for the image:
<img width="300" height="225" src="http://cdn.cconover.com/wp-content/uploads/2011/10/IMG_20111022_124511-300x225.jpg" class="attachment-medium" alt="N3USP's Antenna Mast" title="N3USP's Antenna Mast" />













