I am currently using the Deep Blue theme on my blog (http://www.hellomoni.com) and would like to modify the theme so that I can remove the vertical ruled line next to the right column.

I've deleted the code for the image file (bg-content_right) from the screen.css file but it's still there!! Can anyone help me please?

I believe you need to edit an image to get rid of that... specifically look at http://hellomoni.com/files/themes/DeepBlue/i/bg-content.gif.  It's likely just 1 pixel in height, so you'll need an image editor that can zoom in to see what's going on.

Ok - I went ahead and made the edit for you. Download the zip, extract the image and overwrite your bg-content.gif with this one.

http://www.mediafire.com/?sharekey=aebb9f0508eb3b3ad2db6fb9a8902bda