Thanks Juggledad, I already did that. It is common sense to use the visual configurator...
I actually needed to change the height of the left column and make it go all the way up.
In fact my intention was initially different, I wanted to keep the logo full lenght and the left sidebar to begin under the logo. But then I realized that this is probably too complicated because the header is a block that contains other ellements such as %bar1 %logo %cats %bar2 %pages %bar1 that cannot be easily separated.
Any ideas about how can I make the left sidebar to go all the way up?
Thanks,
Dor