Hmm odd...
Have you tried going into admin and looking at the speed bar page (admin/speed_bar.php). Do they have quotes or html-encoded wrapping surrounding the link titles in there?
If you have modified the link yourself outside of x-cart then the .tpl to look at is skin1/customer/top_menu.tpl ...
And this is the original 4.1.9 stock code for the speed bar that affects that point...
<td valign="top">{include file="customer/tab.tpl" tab_title="<a href=\"`$speed_bar[sb].link`\">`$speed_bar[sb].title`</a>"}</td>
If the latter is involved then you may have added an extra " by accident around the <a href=\" part.
Not sure if this helps & Remember to back up.
Regards,
Doms