That cannot be the point ... I also have your same resolution on a Samsung SyncMaster (24") HDMI 1920x1080 ...
I thought that'd be a Photobucket restriction, but as your pictures show more big although mine are of the
same or similar big size I just wondered and that has nothing to do with one's monitor when Photobucket
displays the pictures differently I suppose, and so I thought that I maybe had to add something to the url
or adjust something in my Photobucket preferences ...