Fix not working former_ids. Add support for "Invalid accounts". Now when id from former_ids tries to create a profile "This account is invalid." error message is displayed. Compare emails in lower cases to prevent changing User email to the same email with different character casing (needs some more testing).
Patch by: Pawel Solyga
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>{#advanced_dlg.anchor_title}</title>
<script type="text/javascript" src="../../tiny_mce_popup.js"></script>
<script type="text/javascript" src="js/anchor.js"></script>
<base target="_self" />
</head>
<body style="display: none">
<form onsubmit="AnchorDialog.update();return false;" action="#">
<table border="0" cellpadding="4" cellspacing="0">
<tr>
<td colspan="2" class="title">{#advanced_dlg.anchor_title}</td>
</tr>
<tr>
<td nowrap="nowrap">{#advanced_dlg.anchor_name}:</td>
<td><input name="anchorName" type="text" class="mceFocus" id="anchorName" value="" style="width: 200px" /></td>
</tr>
</table>
<div class="mceActionPanel">
<div style="float: left">
<input type="submit" id="insert" name="insert" value="{#update}" />
</div>
<div style="float: right">
<input type="button" id="cancel" name="cancel" value="{#cancel}" onclick="tinyMCEPopup.close();" />
</div>
</div>
</form>
</body>
</html>