[Applicable to google chrome only]
If you are bored with that same old white bluish plain screen then there's a way for you to change it and use whichever image you want to use as background, it can just be done with a Google chrome extension FB Refresh.
So to change your login background, Download FB Refresh then go to Wrench Menu >> Tools >> Extensions >> FB Refresh and enter the URL of the image you want to put as the background. Now just go to the login screen and you will see it done.
[ Note:This extension cannot upload photos from the PC it can just work on the internet URL]
*If you you want to use any picture from your PC as your Facebook login background then you can upload the picture anywhere on the internet(picasa,flicker, facebook,etc) and upload its url as above.
So to change your login background, Download FB Refresh then go to Wrench Menu >> Tools >> Extensions >> FB Refresh and enter the URL of the image you want to put as the background. Now just go to the login screen and you will see it done.
[ Note:This extension cannot upload photos from the PC it can just work on the internet URL]
*If you you want to use any picture from your PC as your Facebook login background then you can upload the picture anywhere on the internet(picasa,flicker, facebook,etc) and upload its url as above.