fix for version 2.0.3 with problem with signature leaving after you hit submit button. Doesn't look as pretty but it works and corrects the problem. Make this change only if you have installed and are using the button on the right and the signature preview on the left in usercp profile
Find this in modifyprofile template
PHP Code:
<td bgcolor="#DFDFDF" valign="top"><blockquote>$signaturepreview</blockquote></td>
Replace with this
PHP Code:
<td bgcolor="{secondaltcolor}"><textarea name="signature" rows="6" cols="40">$bbuserinfo[signature]</textarea></td>