I don't remember how long I been having problem with Google Webmaster Tool regarding Sitemap showing errors and no Url indexed, but starting last night I saw 1 of my sitemap shows an improvement and this morning all my sitemap show no more error.. I know lots of webmaster having the same issue for several months now before and after Webmaster Tool change its appearance..
mine not showing error but it always show status pending with total & index url = 0, this happen after Webmaster Tool change its appearance