Less than a month after releasing a security update to Winamp, Nullsoft has delivered <A HREF="http://news.zdnet.com/2110-1009_22-6043227.html?tag=zdnn.alert">a new version of the media player</A> to plug serious bugs. Winamp 5.2, issued Thursday, tackles a vulnerability in the software's handling of m3u playlist files, according to a developer posting on an online forum from Nullsoft.