Hi,
I've an exposed form with a date field select with a list of years (Anno in italian).

Looking at the code you can see:
edit-field-anno-value"> Anno

so, the code for the select should be:
name="edit-field-anno-value">

and not:

name="field_anno_value[value][year]">

This is a major accessibility issue. I paste partial code below

<div id="edit-field-anno-value-wrapper" class="views-exposed-widget views-widget-filter-field_anno_value">
<label for="edit-field-anno-value"> Anno </label>
<div class="views-widget">
<div id="edit-field-anno-value-value-wrapper">
<div id="edit-field-anno-value-value">
<div class="container-inline-date">
<div class="form-item form-type-date-select form-item-field-anno-value-value">
<div id="edit-field-anno-value-value" class="date-padding clearfix">
<div class="form-item form-type-select form-item-field-anno-value-value-year">
<div class="date-year">
<select id="edit-field-anno-value-value-year" class="date-year form-select" name="field_anno_value[value][year]">
<option selected="selected" value="">-Anno</option>
<option value="2010">2010</option>
<option value="2011">2011</option>
<option value="2012">2012</option>
<option value="2013">2013</option>
</select>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
Files: 
CommentFileSizeAuthor
exposed form.png4.29 KBpietrocap