#4437 Transparent div covers text field

[PAXcoder]

I have noticed that sometimes I when I use the bottom textbox to write a comment on Slashdot, and I try to click the right part of it, the whole textbox gets out of focus. I simply used Firebug to see what it is, and it appears that a transparent div covers the bottom-right part of the textbox.
I'm not sure but it might be that it appears when the bottom right text changes.
Here's the code in question:

<div id="topfoot">
<div class="search">
<form action="//news.slashdot.org/search.pl" method="get">
<fieldset>
</fieldset>
</form>
</div>
<div class="rightcontent">
<small>Bus error -- driver executed.</small>
</div>
<div id="slug-Bottom" class="slug" style="display: block;"/>
</div>

The "Bus error..." is the (new?) message. Div with an id slug-Bottom is the one obstructing the part of the textbox.
Thanks.