when i drag a file and pointed it to yahoo mail "drop zone", the "drop zone" not become highlighted (no yellow colour) and the function is not working. If i still drop the file, the browser will loaded it instead of uploading it. (this drag and drop function can work well on IE.. but firefox is my favourite..) Please help, because i don't know what to do.. I don't think there is any virus on my computer because i have formatted it before and install the firefox. For the first time, this drag and drop function working properly. Is there anything to do with the plugins or the firefox version (i'm using firefox 3.6.15)? ..Thank you before..