Theme development

hello all,

im modifying an old theme and the new style.css file to be used. but still find some

i begin to do a template based in garland code everything looks good but i have a little anoying detail
i do a template wiht tables (sorry) and i saw a horizontal line in top of each table.

i cant discover where is the css code controlling this horizontal line you can see the problem here:

http://www.crswork.com/?q=node/6

On my site I use a centred "nice menus" in dropdown mode in the "header" region. Is there any way for my to get rid of where it says "Header Menu"?

If you look at literarymagic.com/d/ you will notice a _slight_ error with the layout. I am a hacker so if need by I can respond to technical questions.
I am having troupble moding the CSS to fix this.
Also note a custom centered header block.

Is there a list of theme changes in order to update a 4.7.5 theme to work in 5? It seems like this should be fairly easy.

Ok this may sound pretty newbieish but I'm having problems pushing the blocks in the right column of blue bluemarine theme over to the right. I have tried everything I can think of and got it to work the way I want in IE atleast 4 different ways but I can't figure out how to make it work in Firefox. I even referenced my Zen Garden book and still can figure it out.

Anyway when you look at the right menu on my page you'll see that blocks need to be centered or just moved over in that column so they don't overlap the strip in the background.

Just a quick warning my url is adult related so I will only put my site name and no link. There are no popups (not that there will ever be) or even advertisements ( there will be some of those ) because it's still in developement. Any help figuring this out would be greatly appreciated.

Site name: sexstoriesexchange.com/stories/
Here is my complete CSS file: ( I made a bit of a mess of it trying different things..sorry )

/* $Id: style.css,v 1.13.2.2 2007/01/04 21:19:48 killes Exp $ */

/*
** HTML elements
*/
body {
margin: 0;
padding: 0;
color: #4b180f;
background-color: #430505;

font: 95% Verdana, Arial, Helvetica, sans-serif, georgia;
}

#footer {
background-color: #430505;
background:
font-size: 0.8em;
color: #dbccbe;
border: 0px 1px 1px 1px;
}

#sidebar-left h2{