CSS/JS Menu Links Collapse on Mouseout in Opera

Hey guys -- I recently implemented a CSS/Javascript menu for my employer, www.gayot.com. After installing the menu it appears to work fine in all browsers except for Opera. In Opera, as you can see at the http://www.gayot.com homepage, the menu items collapse under one another after hovering over, then moving your mouse away from a main navigation bar. I've tried several things to try to resolve this issue, but am continuously stumped. Any help would be greatly appreciated.

Cheers,
Mike

/* 800px HORIZONTAL FREESTYLE MENU LAYOUT */


/* All <ul> tags in the menu including the first level */
.menulist800, .menulist800  ul {
 margin: 0;
 padding: 0;
 list-style: none;
 font-family:Verdana, Arial, Helvetica, sans-serif;
 font-size: 10px;
 text-align: left;
}

/* Submenus (<ul> tags) are hidden and absolutely positioned downwards from their parent */
.menulist800 ul {
 display: none;
 position: absolute;
 top: 1.0em; margin-top: 16px; /* I'm using ems and px to allow people to zoom their font */
 left: -1px;
 width: 150px;
}

/* Second and third etc. level submenus - position across from parent instead */
.menulist800 ul ul {
 top: -1px; margin-top: 0;
 left: 148px;
}

/*
 All menu items (<li> tags). 'float: left' lines them up horizontally, and they are
 positioned relatively to correctly offset submenus. Also, they have overlapping borders.
*/
.menulist800 li {
 float: left;
 display: block;
 position: relative;
 background: #FFF;
 border: 0px solid #330;
 margin-right: 0px;
}

/* Items in submenus - override float/border/margin from above, restoring default vertical style */
.menulist800 ul li {
 float: none;
 margin: 0;
 margin-bottom: -1px;
 border: 1px solid #330;
}
.menulist800 ul>li:last-child {
 margin-bottom: 1px; /* Mozilla fix */
}

/* Links inside the menu */
.menulist800 a {
 display: block;
 padding: 6px;
 color: #000;
 text-decoration: none;
}

/* Lit  items: 'hover' is mouseover, 'highlighted' are parent items to visible menus */
.menulist800 a:hover, .menulist800 a.highlighted:hover, .menulist800 a:focus {
 color: #FFF;
 background-color: #5b7eb1;
 text-decoration: none;
}
.menulist800 a.highlighted {
 color: #000;
 background-color: #d4e3fa;
}

/* Only style submenu indicators within submenus. */
.menulist800 a .subind {
 display: none;
}
.menulist800 ul a .subind {
 display: block;
 float: right;
}


/* 'Escaped Comment' hack for horizontal menubar width in IE5/Mac */
.menulist800 a {
 float: left;
}
.menulist800 ul a {
 float: none;
}
/* \*/
.menulist800 a {
 float: none;
}
/* */

.menulist800 a#home, .menulist800 a#restaurants, .menulist800 a#hotels, .menulist800 a#travel, .menulist800 a#lifestyle, .menulist800 a#events, .menulist800 a#wine, .menulist800 a#food, .menulist800 a#community, .menulist800 a#about, .menulist800 a#login    {
 background: url(http://gayot.com/Beta2/images/bg_off_gray.gif);
 color: #222;
 padding: 7px 8.35px 8px 8px;
 border-left: 1px solid #666;
 text-transform: uppercase;
 font-size: 10px;
 font-weight: bold;
 text-align: center;
 float: left;
 margin: 0;
}

.menulist800 a#restaurants {
background: url(http://gayot.com/Beta2/images/bg_on_gray.gif);
color: #fff;
}

.menulist800 a#home {
border-left: none;
}


.menulist800 a#home:hover, .menulist800 a.highlighted#home, .menulist800 a#home:focus, .menulist800 a#restaurants:hover, .menulist800 a.highlighted#restaurants, .menulist800 a#restaurants:focus, .menulist800 a#hotels:hover, .menulist800 a.highlighted#hotels, .menulist800 a#hotels:focus, .menulist800  a#travel:hover, .menulis800 a.highlighted#travel, .menulist800 a#travel:focus, .menulist800 a#lifestyle:hover, .menulist 800 a.highlighted#lifestyle, .menulist800 a#lifestyle:focus, .menulist800 a#events:hover, .menulist800 a.highlighted#events, .menulist800 a#events:focus, .menulist800 a#wine:hover, .menulist800 a.highlighted#wine, .menulist800 a#wine:focus, .menulist800 a#food:hover, .menulist800 a.highlighted#food, .menulist800 a#food:focus, .menulist800 a#community:hover, .menulist800 a.highlighted#community, .menulist800 a#community:focus, .menulist800 a#about:hover, .menulist800 a.highlighted#about, .menulist800 a#about:focus, .menulist800 a#login:hover, .menulist800 a.highlighted#login, .menulist800 a#login:focus    {
background: url(http://gayot.com/Beta2/images/bg_on_gray.gif);
color: #fff;
text-decoration: none;
display: block; 
}

/*
 HACKS: IE/Win:
 A small height on <li> and <a> tags and floating prevents gaps in menu.
 * html affects <=IE6 and *:first-child+html affects IE7.
 You may want to move these to browser-specific style sheets.
*/
*:first-child+html .menulist800 ul li {
 float: left;
 width: 100%;
}

* html .menulist800 ul li {
 float: left;
 height: 1%;
}
* html .menulist800 ul a {
 height: 1%;
}

/* End 800px javascript menu */

Code (markup):