Help! Recent troubles when uploading to web

I don't know how this started, but recently I've noticed a change in my uploads to any website: the image turns out flat, de-saturated and a hint of green. This only happens when the image was shot in RAW to begin with - I then do my normal stuff in Photoshop (working in CS3) and save it as a JPEG. If I've shot anything in JPEG to begin with, no problems uploading to the web. Someone suggested to copy & paste the flattened image to a blank canvas, and save that.... tried, and it works slightly, but the image still isn't 100%. Any suggestions?!