I have a pretty standard Rails form:

<div>
    <h1>Create a New Listing</h1>
    <%- form_for @listing, :html => {:multipart => true} do |f| -%>
                    <div><%= f.label :title, "Title:"%> <%= f.text_field :title %></div>
            <div>
                <%= f.label :image, "Image:" %> <%= f.file_field :image 
            </div>
            <div>
                <%= f.label :sound, "Sound Clip:"%> <%= f.file_field :sound %><br />
            </div>
        <div class="submit"><%= f.submit 'Post Listing' %></div>
    <%- end -%>
</div>

When a user chooses a file, but the form fails for validation purposes, he must always re-select the file. It is not sticky. Any suggestion on how to fix this?

Thanks!