HELP! Spry Submenu No Longer Working in Firefox

Question

This used to work, I've made some changes to the site, adding
to the menu etc. now the submenus no longer collapse in Firefox,
fine in IE. I haven't changed the JS from when it used to work,
although, here's the bottom half, attached below. Here's the index:
http://hollycontracting.com/dev
@charset "UTF-8";
/* SpryMenuBarVertical.css - version 0.6 - Spry Pre-Release
1.6.1 */
/* Copyright (c) 2006. Adobe Systems Incorporated. All rights
reserved. */
LAYOUT INFORMATION: describes box model, positioning,
z-order
/* The outermost container of the Menu Bar, a fixed width box
with no margin or padding */
ul.MenuBarVertical
margin: 5px;
padding: 0;
list-style-type: none;
font-size: 100%;
cursor: default;
width: 9em;*/
/* Set the active Menu Bar with this class, currently setting
z-index to accomodate IE rendering bug:
http://therealcrisp.xs4all.nl/meuk/IE-zindexbug.html
ul.MenuBarActive
z-index: 1000;
/* Menu item containers, position children relative to this
container and are same fixed width as parent */
ul.MenuBarVertical li
background-image:url(wwww.hollycontracting.com/dev/SpryAssets/SpryMenuBarRightHover.gif);
background-repeat:repeat-x;
margin:0;
padding: 0;
list-style-type: none;
font-size: 11px;
font-weight:bold;
color:#FFFFFF;
position: relative;
text-align: left;
cursor: pointer;
width: 10em;
/* Submenus should appear slightly overlapping to the right
(95%) and up (-5%) with a higher z-index, but they are initially
off the left side of the screen (-1000em) */
ul.MenuBarVertical ul
background-image:url(wwww.hollycontracting.com/dev/SpryAssets/SpryMenuBarRightHover.gif);
background-repeat:repeat-x;
margin: 0 0 0 130%;
padding: 0;
list-style-type: none;
font-size: 11px;
font-weight:bold;
color:#161616;
position: absolute;
z-index: 1020;
cursor: default;
width: 8em;*/
left: -1000em;
top: 0;
/* Submenu that is showing with class designation
MenuBarSubmenuVisible, we set left to 0 so it comes onto the screen
ul.MenuBarVertical ul.MenuBarSubmenuVisible
left: 0;
/* Menu item containers are same fixed width as parent */
ul.MenuBarVertical ul li
width: 6.5em;
DESIGN INFORMATION: describes color scheme, borders, fonts
/* Outermost menu container has borders on all sides */
ul.MenuBarVertical
border: 0px solid #161616;
/* Submenu containers have borders on all sides */
ul.MenuBarVertical ul
border: 0px solid #161616;
/* Menu items are a light gray block with padding and no text
decoration */
ul.MenuBarVertical a
display: block;
cursor: pointer;
background-image:url(wwww.hollycontracting.com/dev/SpryAssets/SpryMenuBarRightHover.gif);
background-repeat:repeat-x;
padding: 0.5em 0.75em;
font-size: 11px;
font-weight:bold;
color:#C3922E;
text-decoration: none;
/* Menu items that have mouse over or focus have a blue
background and white text */
ul.MenuBarVertical a:hover, ul.MenuBarVertical a:focus
background-image:url(wwww.hollycontracting.com/dev/SpryAssets/SpryMenuBarRightHover.gif);
background-repeat:repeat-x;
font-size: 11px;
font-weight:bold;
color:#FFFFFF;
/* Menu items that are open with submenus are set to
MenuBarItemHover with a blue background and white text */
ul.MenuBarVertical a.MenuBarItemHover, ul.MenuBarVertical
a.MenuBarItemSubmenuHover, ul.MenuBarVertical
a.MenuBarSubmenuVisible
background-image:url(wwww.hollycontracting.com/dev/SpryAssets/SpryMenuBarRightHover.gif);
background-repeat:repeat-x;
font-size: 11px;
font-weight:bold;
color:#FFFFFF;
SUBMENU INDICATION: styles if there is a submenu under a
given menu item
/* Menu items that have a submenu have the class designation
MenuBarItemSubmenu and are set to use a background image positioned
on the far left (95%) and centered vertically (50%) */
ul.MenuBarVertical a.MenuBarItemSubmenu
background-image:
url(wwww.hollycontracting.com/dev/SpryAssets/SpryMenuBarRightHover.gif);
background-repeat: no-repeat;
background-position: 95% 50%;
/* Menu items that are open with submenus have the class
designation MenuBarItemSubmenuHover and are set to use a "hover"
background image positioned on the far left (95%) and centered
vertically (50%) */
ul.MenuBarVertical a.MenuBarItemSubmenuHover
background-image:
url(wwww.hollycontracting.com/dev/SpryAssets/SpryMenuBarRightHover.gif);
background-repeat: no-repeat;
background-position: 95% 50%;
BROWSER HACKS: the hacks below should not be changed unless
you are an expert
/* HACK FOR IE: to make sure the sub menus show above form
controls, we underlay each submenu with an iframe */
ul.MenuBarVertical iframe
//position: absolute;
z-index: 1010;
filter:alpha(opacity:0.1);
BROWSER HACKS: the hacks below should not be changed unless
you are an expert
/* HACK FOR IE: to stabilize appearance of menu items; the
slash in float is to keep IE 5.0 from parsing */
@media screen, projection
ul.MenuBarVertical li.MenuBarItemIE
display: inline;
f/loat: left;

Answer 1

Search teh forums some have reported that removing the cache in Safari resolves this issue
LN