Background immage vissible in edit-mode makes it hard to see what you do, how to fix?

[cecepee]

Hello.

After i upgraded to 1.2.50 there has been many problems and all have been dealt with.
But i have one little annoying problem left.
When i get to the places in BO where i can write or edit the homesite or products the background picture from the site is there, it makes it very hard to see what u type and so on.
Is there a way to get away the background image from the editing fields?
I attach a picture to show what i mean. the gray-blue background is my background picture, but in presta its covered by the tables white background só the text can be read without problem, but here it shows up and makes it annoying to edit the text. What can i do?

Best regards
Peter