strange problem with background image in XP

[Chadi]

I have some members still using XP, but either Chrome or Firefox that are having this odd issue with one of my green arrow "subscribed to thread" image I have.

Screenshot shows the difference. The XP / error screenshot shows the green arrow not picking up on the "width=16" html code and therefore, covering over the topic thread title row.

HTML CODE

<div class="inner">
				<h3 class="threadtitle">
                    <a href="http://www.talkjesus.com/press-stand/46706-scottish-street-preacher-arrested-new-post.html" id="thread_gotonew_46706"><img class="gotonewpost" src="http://www.talkjesus.com/images/metro/blue/buttons/firstnew.png" width="16" alt="Go to first new post" title="Go to first new post"></a>
                	<a class="title threadtitle_unread" href="http://www.talkjesus.com/press-stand/46706-scottish-street-preacher-arrested.html" id="thread_title_46706">Scottish street preacher arrested</a> 
				</h3>
				<div class="threadmeta">				
					<div class="author">
							<span class="label">Started by&nbsp;<a href="http://www.talkjesus.com/members/fragrant+grace.html" class="username understate" title="Started by Fragrant Grace on 09-19-13 03:34 PM">Fragrant Grace</a>,&nbsp;09-19-13&nbsp;03:34 PM</span>
						<!-- iconinfo -->
						<div class="threaddetails td">
							<div class="threaddetailicons">
							</div>
						</div>
					</div>
				</div>
			</div>

CSS CODE

.threadbit .threadtitle {
background: transparent none no-repeat right top;
padding-left: 0;
margin-right: 12px;
margin-top: 15px;
}

Thanks for the help