function frijheid_panels_rounded_corners_style_render_panel($display, $panel_id, $panes, $settings) {
  $output = '';

  // Determine where to put the box. If empty or 'pane' around each pane. If
  // 'panel' then just around the whole panel.
  $where = empty($settings['corner_location']) ? 'pane' : $settings['corner_location'];

  $print_separator = FALSE;
  foreach ($panes as $pane_id => $pane) {
    // Add the separator if we've already displayed a pane.
    $text = theme('panels_pane', $pane, $display->content[$pane_id], $display);
    $css_id = $pane->module .'-'. $pane->delta;
    if ($text) {
      $output .= ($where == 'pane') ? theme('rounded_corners_box', $text, $css_id) : $text;
    }
  }

  if ($where == 'panel') {
    $output = theme('rounded_corners_box', $output);
  }

  return $output;
}

function frijheid_rounded_corners_box($content, $css_id = '') {
  return <<<EOF
<div id="$css_id" class="dialog">
<div class="content">
<div class="wrapper">
<div class="t">
</div>
<!-- Your content goes here -->
$content
<!-- end content -->
</div>
</div>
<div class="b">
<div>
</div>
</div>
</div>
EOF;
}


**** CSS ****

#mini-panel-longterm_campaign .dialog .content,
#mini-panel-longterm_campaign .dialog .t,
#mini-panel-longterm_campaign .dialog .b,
#mini-panel-longterm_campaign .dialog .b div { background-image: url(images/d5c4ff-bd-3f1f85-hd.png); }

/* 
  -- Even more rounded corners with CSS: Base stylesheet --
*/

.dialog
{
	position: relative;
	margin: 0px auto;
	min-width: 8em;
	max-width: 760px;
	/* based on image dimensions - not quite consistent with drip styles yet */
	color: #fff;
	z-index: 1;
	margin-left: 12px;
	/* default, width of left corner */
	margin-bottom: 0.5em;
	/* spacing under dialog */
}

.dialog .content,
.dialog .t,
.dialog .b,
.dialog .b div
{
	background: transparent url(dialog2-blue-800x1600.png) no-repeat top right;
	_background-image: url(dialog2-blue.gif);
}

.dialog .content
{
	background-position: top right;
	position: relative;
	zoom: 1;
	_overflow-y: hidden;
	padding: 0px 12px 0px 0px;
}

.dialog .t
{
	/* top+left vertical slice */
	position: absolute;
	left: 0px;
	top: 0px;
	width: 12px;
	/* top slice width */
	margin-left: -12px;
	height: 100%;
	_height: 1600px;
	/* arbitrary long height, IE 6 */
	background-position: top left;
}

.dialog .b
{
	/* bottom */
	position: relative;
	width: 100%;
}

.dialog .b,
.dialog .b div
{
	height: 30px;
	/* height of bottom cap/shade */
	font-size: 1px;
}

.dialog .b { background-position: bottom right; }

.dialog .b div
{
	position: relative;
	width: 12px;
	/* bottom corner width */
	margin-left: -12px;
	background-position: bottom left;
}

.dialog .wrapper
{
	/* extra content protector - preventing vertical overflow (past background) */
	position: static;
	max-height: 1000px;
	overflow: auto;
	/* note that overflow:auto causes a rather annoying redraw "lag" in Firefox 2, and may degrade performance. Might be worth trying without if you aren't worried about height/overflow issues. */
}