Spry Accordion not collapsing properly in IE & Firefox

Question

My design portfolio is on my testing server. The accordion
works perfect in Safari but it will not collapse in Firefox and
Internet Explorer. Here is the link:
http://deptart2.memphis.edu/~jwilcoxen/web_portfolio/home.php
. Please help. I attached my spry accordion css.
@charset "UTF-8";
/* SpryAccordion.css - Revision: Spry Preview Release 1.4 */
/* Copyright (c) 2006. Adobe Systems Incorporated. All rights
reserved. */
/* This is the selector for the main Accordion container. For
our default style,
* we draw borders on the left, right, and bottom. The top
border of the Accordion
* will be rendered by the first AccordionPanelTab which
never moves.
* If you want to constrain the width of the Accordion
widget, set a width on
* the Accordion container. By default, our accordion expands
horizontally to fill
* up available space.
* The name of the class ("Accordion") used in this selector
is not necessary
* to make the widget function. You can use any class name
you want to style the
* Accordion container.
.Accordion {
border-left: none gray;
border-right: none black;
border-bottom: none gray;
overflow: auto;
background-color: #FFFFFF;
font-family: "Gill Sans", "Helvetica Neue", "Arial Narrow",
sans-serif, Helvetica;
padding: 10px;
background-image: url(../images/glowbg_home.jpg);
background-repeat: no-repeat;
text-align: left;
text-indent: 8px;
/* This is the selector for the AccordionPanel container
which houses the
* panel tab and a panel content area. It doesn't render
visually, but we
* make sure that it has zero margin and padding.
* The name of the class ("AccordionPanel") used in this
selector is not necessary
* to make the widget function. You can use any class name
you want to style an
* accordion panel container.
.AccordionPanel {
margin: 0px;
padding: 0px;
background-color: ##54275F;
/* This is the selector for the AccordionPanelTab. This
container houses
* the title for the panel. This is also the container that
the user clicks
* on to open a specific panel.
* The name of the class ("AccordionPanelTab") used in this
selector is not necessary
* to make the widget function. You can use any class name
you want to style an
* accordion panel tab container.
.AccordionPanelTab {
background-color: #000000;
border-top: 1px none black;
border-bottom: 1px none gray;
margin: 0px;
padding: 2px;
cursor: pointer;
-moz-user-select: none;
-khtml-user-select: none;
color: #CCCCCC;
font-family: "Gill Sans", "Helvetica Neue", "Arial Narrow",
sans-serif, Helvetica;
font-size: 12px;
font-weight: normal;
/* This is the selector for a Panel's Content area. It's
important to note that
* you should never put any padding on the panel's content
area if you plan to
* use the Accordions panel animations. Placing a non-zero
padding on the content
* area can cause the accordion to abruptly grow in height
while the panels animate.
* Anyone who styles an Accordion *MUST* specify a height on
the Accordion Panel
* Content container.
* The name of the class ("AccordionPanelContent") used in
this selector is not necessary
* to make the widget function. You can use any class name
you want to style an
* accordion panel content container.
.AccordionPanelContent {
overflow: hidden;
margin: 0px;
padding: 0px;
background-color: #CCCCCC;
text-align: left;
vertical-align: 50%;
height: 326px;
/* This is an example of how to change the appearance of the
panel tab that is
* currently open. The class "AccordionPanelOpen" is
programatically added and removed
* from panels as the user clicks on the tabs within the
Accordion.
.AccordionPanelOpen .AccordionPanelTab {
background-color: #4F285B;
/* This is an example of how to change the appearance of the
panel tab as the
* mouse hovers over it. The class "AccordionPanelTabHover"
is programatically added
* and removed from panel tab containers as the mouse enters
and exits the tab container.
.AccordionPanelTabHover {
color: #51275D;
.AccordionPanelOpen .AccordionPanelTabHover {
color: #FFFFFF;
background-color: ##54275F;
/* This is an example of how to change the appearance of all
the panel tabs when the
* Accordion has focus. The "AccordionFocused" class is
programatically added and removed
* whenever the Accordion gains or loses keyboard focus.
.AccordionFocused .AccordionPanelTab {
background-color: #000000;
/* This is an example of how to change the appearance of the
panel tab that is
* currently open when the Accordion has focus.
.AccordionFocused .AccordionPanelOpen .AccordionPanelTab {
background-color: ##54275F;
height: 310px;

Answer 1

Thanks Gramps, that information was really helpful.
I just removed all instances of 'rgba' in the .css rules that specify color, changing it to 'rgb' and also removing the 4th parameter indicating the transparency value.
Now that I understand what the problem was it actually makes complete sense, since IE does not support transparency.
Thanks again.