I've set up a Son of Suckerfish menu on my SS installation to automatically display sub-pages in the drop-down. This works successfully in Firefox and IE7+, but in IE6 the submenu (drop-down) appears to the right of where it should. It still drops down, but it's offset to precisely the end of the top-level menu item.

Please see the attachment for an example.

I've tried adding CSS to the IE6.css stylesheet to relatively position the submenu (UL) and its sub-elements. I've also tried absolute positioning, negative margins, and so on.

Has anyone else encountered this issue and solved it?

Problem must be in css, IE6 layer position.
Seems, that 1-level menu button has float:right and 2-level drop-down "make this".
Try remove this floating in drop-down layer style for IE6 (position:relative, clear:both in drop-down).

... or show css for navigation :)

Thanks for the reply. My CSS is as follows:

---------------------------------------
layout.css
---------------------------------------

#Navigation {
width: 960px;
height: 42px;
margin-left: 14px;
border-bottom: 3px solid #ac5d11;
overflow: hidden;
background: #361406;
}

#Navigation ul {
float: left;
margin-right: 10px;
margin-top: 5px;
margin-left: 9px;
}

#Navigation ul li {
list-style: none;
margin: 0 2px 0 0;
float: left;
height: 37px;
line-height: 37px;
display: block;
text-transform: uppercase;
font-weight: bold;
}

#Navigation ul li a {
float: left;
text-decoration: none;
display: block;
padding: 0 0 0 10px;
color: #FFFFFF;
height: 37px;
}

/* even out the padding to the right of the text */
#Navigation ul li a span {
text-align: center;
float: left;
padding-right: 10px;
}

#Navigation ul li a:hover {
background: url(../images/menu_bkg_left.gif) top left no-repeat #ac5d11;
color: #FFFFFF;
cursor: pointer;
}

#Navigation ul li a:hover span {
background: url(../images/menu_bkg_right.gif) top right no-repeat transparent;
cursor: pointer;
}

#Navigation ul li a.current,
#Navigation ul li a.section,
#Navigation ul li a.section:hover,
#Navigation ul li a.current:hover {
background: url(../images/menu_bkg_left.gif) top left no-repeat #ac5d11;
color: #FFFFFF;
}

#Navigation ul li a.current span,
#Navigation ul li a.section span,
#Navigation ul li a.section:hover span,
#Navigation ul li a.current:hover span {
background: url(../images/menu_bkg_right.gif) top right no-repeat transparent;
color: #FFFFFF;
}

/* second-level */

#Navigation ul li ul {
position: absolute;
background: #ac5d11;
/* width: 10em;*/
left: -999em; /* using left instead of display to hide menus because display: none isn't read by screen readers */
margin-top: 37px;
width: 200px;
border: 1px solid #ac5d11;
border-top: none;
margin-left: 0;
}

#Navigation ul li ul li {
float: none;
height: 25px;
line-height: 25px;
text-transform: none;
width: 200px;
margin: 0;
font-weight: normal;
border-bottom: 1px solid #b97636;
}

#Navigation ul li ul li a {
clear: both;
height: 25px;
width: 190px;
padding: 0 0 0 10px;
}

#Navigation ul li ul li a:hover {
background: #FFFFFF;
color: #361406;
}

#Navigation ul li ul li a span {
float: none;
text-align: left;
width: 200px;
}

#Navigation ul li ul li a:hover span {
background: #FFFFFF;
}

#Navigation ul li ul li a.current,
#Navigation ul li ul li a.section,
#Navigation ul li ul li a.section:hover,
#Navigation ul li ul li a.current:hover {
background: #FFFFFF;
color: #361406;
}

#Navigation ul li ul li a.current span,
#Navigation ul li ul li a.section span,
#Navigation ul li ul li a.section:hover span,
#Navigation ul li ul li a.current:hover span {
background: #FFFFFF;
color: #361406;
}

#Navigation li:hover ul,
#Navigation li.sfhover ul { /* lists nested under hovered list items */
left: auto;
}

---------------------------------------
ie6.css
---------------------------------------

#Navigation ul li ul {
position: relative;
margin-left: -100px;
}

(ran out of ideas :P)

Hmmm, in this case you cant "repair IE6" with few lines. The independent style for this browser is needed :(

Some ideas you find at http://www.alistapart.com/articles/horizdropdowns/ (with js) or here: http://www.cssplay.co.uk/menus/
And also you can make javascript navigation for IE6.

Thanks for the reply. Are you suggesting I replace the existing menu with another? I've used plenty of menus before but Son of Suckerfish was the one suggested on the SS forums (in a topic about creating submenus). I was hoping to just hack away at the IE6-specific CSS until I found a solution.

But maybe it's better to just try another system and see how it goes. Cheers.