CSS Issue with overflow text.

[artinteg]

<div id='pageThread' class="hide" style="overflow: scroll;">

<span class="page currentpage">1</span>
<span class="page" onclick="mwlcall()">1</span>
<span class="page" onclick="mwlcall()">2</span>
<span class="page" onclick="mwlcall()">3</span>
<span class="page" onclick="mwlcall()">4</span>
.
.
.
</div>

I have over 80 pages.

My question is, why is there a different rendering on emulator and device.

Here's screenshot from both emulator & device: