Menu items are links. I said I'm not a fan of it on things that aren't links, e.g., you've got it on your heading. Most people know that links change colour when you roll over them, so they come to your header and it changes colour and think it must be a link too, but it doesn't.
As for the installers, are you looking at Windows or Mac installers cos I'm sure the Windows ones weren't that big.
As for the Mac-only hack, does your site work if you take them out?

I meant about the menu items that have a sub menu, and in fact is a sublist, they not necesarly need to be a link because the css :hover works from the li itself, and not the anchor (you dont need it at all):

li:hover ul {display: block;}

That was what i was talking about when I said that this is the way those lists and sublists work in good browsers.

Those thing changing color on hover only works for good browsers, and I am sure that if some one is seeing this behaviours is because he is using a good browser, and must have already know this kind of things from sites that worry about them, like an 'extra' for non IE browsers. Ans as i am sure, most of the users (id say, more than ninety percent) won't be able to see this so they won't even notice...

The installers were for windows, and i was not successful in the installation, it gave me weird errors...

I have not tried that out, I'll take this hacks out.. but you know what I'm talking about right? That thing i think its called the 'holly hack' because it targeted only IE and left all browsers alone so we dont have to fix it again and again... It IS suposed to do that right?