Hello,
Inconsistent across browsers, What is wrong here?

Please see: http://awesomescreenshot.com/01d1r2d47f
HTML Code:
<style>
 .bloc { display:inline-block; vertical-align:top; overflow:hidden; border:solid grey 1px; }
 .bloc select { padding:10px; margin:-5px -20px -5px -5px; }
</style>

<div class="bloc">
  <select size="8" name="haftanin_gunu[]" id="haftanin_gunu" multiple>  
		<option value="-1" selected="selected">*</option>
		<option value="1">Monday</option>
		<option value="2">Tuesday</option>
		<option value="3">Wednesday</option>
		<option value="4">Thursday</option>
		<option value="5">Friday</option>
		<option value="6">Saturday</option>
		<option value="7">Sunday</option>		
  </select>
</div>
Thanks in advance