salut
sous Fire_Fox je sait qu'il y a -moz-border-radius: qui est specifique a FF mais marche avec CSS3 ou IE7 normalement (pas sur pour IE7)
mais mois pour les arrondi j'avait utiliser un code genre comme ca
(c'etait pour <td> et en meme temp je debute donc CSS javascript je connait pas trop) enfin bref voila le code :
/* Inset 3D Raised */
.raised
{
background: transparent; width:100%; margin:0 auto;}
.raised h1, .raised p
{
margin:0 10px;}
.raised h1
{
font-size:2em; color:#fff; letter-spacing:1px;}
.raised p
{
padding-bottom:0.5em;}
.raised .top, .raised .bottom
{
display:block; background:transparent; font-size:1px;}
.raised .b1, .raised .b2, .raised .b3, .raised .b4, .raised .b1b, .raised .b2b, .raised .b3b, .raised .b4b
{
display:block; overflow:hidden;}
.raised .b1, .raised .b2, .raised .b3, .raised .b1b, .raised .b2b, .raised .b3b
{
height:1px;}
.raised .b2
{
background:#000D99; border-left:1px solid #fff; border-right:1px solid #eee;}
.raised .b3
{
background:#000D99; border-left:1px solid #fff; border-right:1px solid #ddd;}
.raised .b4
{
background:#000D99; border-left:1px solid #fff; border-right:1px solid #aaa;}
.raised .b4b
{
background:#000D99; border-left:1px solid #eee; border-right:1px solid #999;}
.raised .b3b
{
background:#000D99; border-left:1px solid #ddd; border-right:1px solid #999;}
.raised .b2b
{
background:#000D99; border-left:1px solid #aaa; border-right:1px solid #999;}
.raised .b1
{
margin:0 5px; background:#fff;}
.raised .b2, .raised .b2b
{
margin:0 3px; border-width:0 2px;}
.raised .b3, .raised .b3b
{
margin:0 2px;}
.raised .b4, .raised .b4b
{
height:2px; margin:0 1px;}
.raised .b1b
{
margin:0 5px; background:#999;}
.raised .boxcontent
{
display:block; background:#000D99; border-left:1px solid #fff; border-right:1px solid #999;}
puis dans le html
<td>
<div class="raised">
<b class="top"><b class="b1"></b><b class="b2"></b><b class="b3"></b><b class="b4"></b></b>
<div class="boxcontent">
<center><font color="white" face="Arial" size="2">ton texte ici</font></center>
</div>
<b class="bottom"><b class="b4b"></b><b class="b3b"></b><b class="b2b"></b><b class="b1b"></b></b>
</div>
</td>
c'est un peu long mais bon ca marche normalement