Check your screen resolution and make sure that 1440 x 900 is the correct one.

Select the thumbnail you wish to download and when it appears in the right side larger pane, hover your mouse over that and select "save" from the slide out menu. You can then save it and use it as wallpaper :-)

For your information, these images are around ten times smaller (in MB) and three times smaller (in actual image size) than the original. But its still quite nice :-)

ENJOY!

Peter & Love Mae