Well guys, I need some help.

I have noticed a huge difference in my pictures between my home computer (27" iMac) and my work computer (15" Dell Latitude E6500). Basically, I'll edit my pics using Aperture and Photoshop from RAW, save a TIFF, and then upload to Flickr as a JPEG. Any format I view them on iMac, they all look the same.

I'll then drive up to work, check out my Flickr, and be the pics will look completely graywashed. What was a bright, contrasted image now looks flat and dull.

Am I going crazy, What gives? How can I get my monitors to display closer to each other?