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What's in store for the next version? (v2.3.0)
Patches Released for v2.1.4 and v2.2.3
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PHP Version 5.3 Reaches End of Life
Though not specific to Exponent CMS, you should be made aware that PHP version 5.3.x is now at end of life and will no longer be updated (http://php.net/archive/2014.php#id2014-08-14-1) The PHP developers recommend upgrading to the latest stable version of 5.5.x or the previous stable version of 5.4.x. If you missed any earlier announcements, PHP version 5.2.x has been obsolete for quite a while at this point.