Textarea inherits background from theme

I have exactly the same problem. I have tried editing various css files to no avail. I guess it is a css problem but I just can't locate the definition that allows the text editing area to pick up the background image of of the site theme's header (using amadou)

Help greatly appreciated!

Just to answer my own question...
I had not noticed that the latest fck has more options for css than before. My problem was fixed by changing the settings for the css in the fck options. To get the styles from the theme that the editor uses just extract the relavent style definitions from the theme's css and saved as a new css file. Then set the options to use that file. Or just use fck default css if you don't want themed styles in the editor panel.
Hope that helps.