Textarea resize issue

.contact_form textarea {padding:8px; width:300px;}
	/* form element visual styles */
	.contact_form input, .contact_form textarea { 
		border:1px solid #aaa;
		box-shadow: 0px 0px 3px #ccc, 0 10px 15px #eee inset;
		border-radius:2px;
		padding-right:30px;
		-moz-transition: padding .25s; 
		-webkit-transition: padding .25s; 
		-o-transition: padding .25s;
		transition: padding .25s;
	}
	.contact_form input:focus, .contact_form textarea:focus {
		background: #fff; 
		border:1px solid #555; 
		box-shadow: 0 0 3px #aaa; 
		padding-right:70px;
	}
/* === HTML5 validation styles === */	
.contact_form input:required, .contact_form textarea:required {
	background: #fff url(../Images/red_asterisk.png) no-repeat 98% center;
}
.contact_form input:required:valid, .contact_form textarea:required:valid {
	background: #fff url(../Images/valid.png) no-repeat 98% center;
	box-shadow: 0 0 5px #5cd053;
	border-color: #28921f;
}
.contact_form input:focus:invalid, .contact_form textarea:focus:invalid {
	background: #fff url(../Images/invalid.png) no-repeat 98% center;
	box-shadow: 0 0 5px #d45252;
	border-color: #b03535
}