Don't worry. Even when dreambeaver is right, it's wrong. Forget how DW is showing it to you, and focus only on the browser. After all, the browser is the only one anyone else will ever see your site in.
Second: I know in this case DW is wrong, because it sounds like your browser is doing the margin-collapse thing... whoops no.
...Okay I had a huge rant on how much margin collapse sucks donkey balls and is one of the worst ideas ever and whoever came up with it is batsh*t insane... but actually here it's because of your floats, not margin collapse. The top margin of a box underneath some floats can kinda slide right up underneath floats. You could instead put a bottom margin of 25px on the element above the wrapper/inner thingie. Some further reading just for interest, about bottom margins, floats, and IE being the drooling glue-eater we all know and love written by our very own Paul O'Brien.
logobild is floated inside #logobuttons, so a bottom margin on logobuttons might not work if logobild is popping out. Which floats do if you don't enclose them.
You could try
I... don't like your markup. What are you making? Image gallery? I'm saying I think you could have simpler CSS with simpler markup, depending on what you're building. Or, the more markup you have, the harder everything gets whether you need it to or not. You have a lot of boxes.
Also, when debugging things involving floats, padding, margins... while developing, give every box an ugly background colour. Not a border or anything that takes up space, just stuff like background-color: #f00, background-color: #ff0, background-colour: #0f0, background-color: #00f... etc. And... setting absolute heights on boxes is either clever evil CSS genius or you hanging yourself. Depends on what you're going for.
I also want to tell you to stop using DW, but I guess that depends on what you're doing... making one site? Fine. Learning to code? Ditch it. Get Notepad++ or Geanie or something that doesn't try any coding for you. Use a set of open browsers as your Design View. They'll be more honest.