Can't insert image when using media uploader elsewhere.

Hi, guys.

I have made a plugin for specific site options, like: Logo, Site name, Addresses, Social Media links etc.

I have 3 image uploaders there: Logo, Pattern and Custom Image. I use the standard WordPress Media Uploader and that works.

This is the code:

<input id="upload_header_logo" class="upload_header_logo" type="text" name="upload_header_logo" value="<?php echo get_option('upload_header_logo'); ?>" />
<input id="upload_logo_button" class="upload_logo_button" type="button" name="upload_logo_button" value="Upload" />

With this javascript:

jQuery('.upload_logo_button').click(function() {
		 targetfield = jQuery(this).prev('.upload_header_logo');
		 tb_show('', 'media-upload.php?type=image&TB_iframe=true');
		 return false;
	});

	window.send_to_editor = function(html) {
		 imgurl = jQuery('img',html).attr('src');
		 jQuery(targetfield).val(imgurl);
		 tb_remove();
	}

This works.

But when I’m on a post or page, I can’t insert images anymore. The Media Uploader appears, I choose an image, click insert, the Media Uploader disappears, but the image is not inserted.

I tried to disable the plugin, change theme to twentytwelve, back to custom theme, enable plugin, but that didn’t work.

Anyone an idea?