I know this sounds stupid, and I'm probably missing something important, but my images won't show up in Firefox.

Just as an example from my WordPress theme that I'm working on (I can't provide a link to the page because it's password protected):

HTML Code:
<div id="LeftHeaderColumn">
                <img id="Logo" src="http://akashicarchives.netcomstudios.com/wp-content/themes/akashicarchives/images/logo.gif" alt="Akashic Archives Logo" />
                <div id="SearchBox">
                    <!-- Search Box Code -->
                </div>
            </div>
The only way I can get the image to display in Firefox is to enter the full address to the image file.

I have tried this without any success:

HTML Code:
<div id="LeftHeaderColumn">
                <img id="Logo" src="/images/logo.gif" alt="Akashic Archives Logo" />
                <div id="SearchBox">
                    <!-- Search Box Code -->
                </div>
            </div>
HTML Code:
<div id="LeftHeaderColumn">
                <img id="Logo" src="images/logo.gif" alt="Akashic Archives Logo" />
                <div id="SearchBox">
                    <!-- Search Box Code -->
                </div>
            </div>
What's up with that?