FIrefox Problem mit Größen und Ausrichtungen

-DIV:screen
+-DIV:picture_board
  +-IMG:main_picture
  -DIV:block_board
  +-button
    -IMG
    -IMG
    -IMG
    -button

/*
 * Entwicklerpages JS Fotogalerie - Fuegt an gewuenschter Stelle eine Fotogalerie mit selbst definierter Fotoquelle ein.
 * Copyright (C) 2011  Nicolas Hollmann
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 */
#screen {
	width: 720px;
	height: 500px;
	border-radius: 10px;
	border: 1px solid #AAA;
	text-align: center;
	padding: 5px;
	background: #8c0000;
	background: -moz-linear-gradient(top, #ff7a7a 0%, #8e4444 43%, #8c0000 45%, #000000 100%);
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ff7a7a), color-stop(43%,#8e4444), color-stop(45%,#8c0000), color-stop(100%,#000000));
	background: -webkit-linear-gradient(top, #ff7a7a 0%,#8e4444 43%,#8c0000 45%,#000000 100%);
	background: -o-linear-gradient(top, #ff7a7a 0%,#8e4444 43%,#8c0000 45%,#000000 100%);
	background: -ms-linear-gradient(top, #ff7a7a 0%,#8e4444 43%,#8c0000 45%,#000000 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ff7a7a', endColorstr='#000000',GradientType=0 );
	background: linear-gradient(top, #ff7a7a 0%,#8e4444 43%,#8c0000 45%,#000000 100%);
}

#picture_board {
	max-height: 415px;
	max-width: 700px;
	overflow: auto;
}

#picture_board img {
	text-align: center;
	vertical-align: center;
	border: 1px solid #AAA;
	margin: 0;
	padding: 0; 
	overflow: auto;
	border: 1px solid #000;
}

#block_board {
	padding: 0;
	margin: 8px;
	height: 70px;
	border: 1px solid #AAA;
	border-radius: 5px;
	bottom: 8px;
	background: #FFF;
}

#block_board .thumbanail {
	border-left: 1px solid #000;
	border-right: 1px solid #000;
	margin-left: 3px;
	margin-right: 3px;
	padding: 0;
}

#block_board button {
	border: 0;
	margin: 0;
	padding: 0;
	margin-right: 10px;
	margin-left: 10px;
}

.#block_board button img {
	border: 0;
	margin: 0;
	padding: 0;
}

-moz-linear-gradient

vertical-align