hi, i have a horizental menu that looks fine in explorer and in mozila it looks like one long line so i tried to add a gif but it isnt working....:

 <ul id="Links">
        <li><a href="some.html"> one </a></li><img src="images/space.gif" border="0" height="10" width="10" /> 
        <li><a href="some.html"> two</a> </li><img src="images/space.gif" border="0" height="10" width="10" /><li><a href="some.html"> three </a></li>    </ul>

in the css i have this:

#Links li
{
display: inline;
 
}

how do i solve this?

There is no need for spacer gifs using CSS.
The display: inline is correct for making a horizontal list. Now to space them out, you need to use margin and padding on the LI and/or <a> elements.

A method I use to see what's going on is to add a 1px border around the element I'm testing, you can then easily see the effects of the changes you are making. When you've got it squared away, delete the border.

but nothing i do works with Mozila .....
i tried padding, padding-left, and also margin and margin- left, and it has no effect in the Mozila....
and i also get an error in the Mozila :
Warning: Error in parsing value for property 'border-left-color'. Declaration dropped.
regarding this:
border-left-color:1px solid #851F03;and it looks ok to me...

the complete code for that is:
]#festLinks li{
display: inline;
border-left-color:1px solid #851F03;
font-family:Arial, Helvetica, sans-serif;
color:#851F03;
padding: 3px 6px;
}

there is no property of border-left-color

just border-left:

ok, what about the first part? why dosent anything i do to my horizental list work?

no idea, do we get a link so we can see the issue first hand ?

Firefox uses margins for lists, IE uses padding. You're going to have to use BOTH to get the results you want.
In addition, you have links inside the list, so adding padding/margins to the <a> will affect it too.