Jay if you mean thickbox method, core doesn't use it for custom header/background uploads, with 3.4 it would be used only to select images from media library. Other solution is to use custom header feature for logos, but as Chip said in <a href="http://make.wordpress.org/themes/2012/05/08/proposed-wordpress-3-4-guidelines-revisions/">"Proposed WordPress 3.4 Guidelines Revisions"</a>, there might be exceptional cases when theme uses both functionality.<br>
<br><div class="gmail_quote">On Fri, May 11, 2012 at 8:02 PM, jay Cauvain <span dir="ltr"><<a href="mailto:wp@stormfire.me" target="_blank">wp@stormfire.me</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<p>It's always best to use core functionality rather than writing your own code.</p>
<div class="gmail_quote"><div><div class="h5">On May 11, 2012 2:27 PM, "George Mamadashvili" <<a href="mailto:georgemamadashvili@gmail.com" target="_blank">georgemamadashvili@gmail.com</a>> wrote:<br type="attribution">
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
Howdy<div><br></div><div>When implementing this feature into theme options, most theme devs are using media uploader thickbox from post edit screen. Personally I would use <input type="file" /> for this task, but where upload handler should be placed? I guess validation callback is best option.</div>
<div><br></div><div>Thanks</div><div><br></div><div>George</div>
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