PHP has announced the release of 5.2.6 which fixes 6 security bugs and a handful of other issues.  Some of the research is still ongoing about how important some of these security bugs are, but they do include a stack overflow and some others that could be nasty depending on how extensive the vulnerability is.  It includes over a 100 or so normal bug fixes so it is probably time to upgrade your PHP installations even if the security issues are non-events.

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John Bambenek, bambenek /at gmail \dot\ com