[lordtopcat]

It could be classed as annoying, but if you wanted a mild flashing border, you could replace

<if condition="$show['tag_option']">
		<fieldset id="example" class="fieldset" style="margin-top: $stylevar[cellpadding]px">
			<legend>$vbphrase[tags]</legend>
			<div style="padding:$stylevar[formspacer]px">
				<div>$vbphrase[separate_tags_using_comma]</div>
				<span id="tag_add"><input type="text" class="bginput" name="taglist" id="tag_add_input" value="$newpost[taglist]" size="40" tabindex="1" /></span>
				<if condition="$show['tags_remain']"><div><phrase 1="$tags_remain">$vbphrase[you_may_add_x_tags_to_thread]</phrase></div></if>
		</div>

			<if condition="$show['popups']">
				<div id="tag_add_menu" class="vbmenu_popup" style="display:none"></div>
				<script type="text/javascript" src="clientscript/vbulletin_ajax_tagsugg.js?v=$vboptions[simpleversion]"></script>
				<script type="text/javascript">
				<!--
				vbmenu_register('tag_add', true);
				tag_add_comp = new vB_AJAX_TagSuggest('tag_add_comp', 'tag_add_input', 'tag_add');
				tag_add_comp.allow_multiple = true;
				tag_add_comp.set_delimiters('$tag_delimiters');
				//-->
				</script>
			</if>
		</fieldset>
		</if>

with

<if condition="$show['tag_option']">
		<fieldset id="example" class="fieldset" style="margin-top: $stylevar[cellpadding]px; border: 1px solid #828177">
			<legend>$vbphrase[tags]</legend>
			<div style="padding:$stylevar[formspacer]px">
				<div>$vbphrase[separate_tags_using_comma]</div>
				<span id="tag_add"><input type="text" class="bginput" name="taglist" id="tag_add_input" value="$newpost[taglist]" size="40" tabindex="1" /></span>
				<if condition="$show['tags_remain']"><div><phrase 1="$tags_remain">$vbphrase[you_may_add_x_tags_to_thread]</phrase></div></if>
		</div>

			<if condition="$show['popups']">
				<div id="tag_add_menu" class="vbmenu_popup" style="display:none"></div>
				<script type="text/javascript" src="clientscript/vbulletin_ajax_tagsugg.js?v=$vboptions[simpleversion]"></script>
				<script type="text/javascript">
				<!--
				vbmenu_register('tag_add', true);
				tag_add_comp = new vB_AJAX_TagSuggest('tag_add_comp', 'tag_add_input', 'tag_add');
				tag_add_comp.allow_multiple = true;
				tag_add_comp.set_delimiters('$tag_delimiters');
				//-->
				</script>
			</if>
		</fieldset>
		</if>
<script language="JavaScript1.2">
<!-- Hide from old browsers

//Flashing Border IE 4,5,6 and NS 6
//Copyright ? Narayan Chand Thakur
//Featured at http://ncthakur.itgo.com/
//This may be used freely as long as this message is intact.

document.getElementById?
nct=document.getElementById("example")
: nct = document.all.example

function startFlash(){
if (nct.style.borderColor.indexOf("red")!=-1)
nct.style.borderColor="#828177"
else
nct.style.borderColor="red"
}
setInterval("startFlash()",500)//change 100 for speed
//-->
</script>

to allow for a mild, smooth red flash.