[SOLVED] unwanted lines and dashed rectangle, in center column and menu bar

hi to all...

i have a problem find a solution to hide the thick solid line in the center column and the dashed rectangle around the whole width of the page in the menue bar. i have inserted a picture who shoes the problem.

the only thing in the center "column/style & edit center column/center column style" is the background color. nothing else.

and in the "header area/page menu bar/border around all menu items" is the entry "dotted 0px #F0F8FF".

here the image:
KLICK =>

christian