The PHP Group released PHP 5.2.8 this morning to fix the magic_quotes_gpc issue.
If you previously installed PHP 5.2.7-0.dotdeb.1 from Dotdeb and do not care about the version number displayed in your phpinfo(), save your bandwidth, your server is already secure :) Otherwise, just apt-get upgrade your LAM P stack…
[update] The packages have been upgraded to 5.2.8-0.dotdeb.1 to fix an issue about pcre & utf8.