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2014/04/06: Version 2.5.7 RC-1
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Bugfixes:
- fixed System Module image manager html/js bugs (luciorota)
- replaced "array_diff_assoc" with "array_diff_key" in /class/theme_blocks.php (masel/mamba)
- icons for active module sections in System module not shown correctly (Slider84/mamba)
- added two new language definitions (see lang_diff.txt)
- added Office 2007 MIME types (Voltan)
- added xml MIME type (Goffy)
- added new icons (mamba)

Updated:
- jQuery to 1.11.0 (mamba)
- jQuery UI 1.10.4 (mamba)
- jQuery Lightbox to 1.2.3 (mamba)
- jQuery Form to 3.50.0 (mamba)
- jQuery Tablesorter to 2.5.11 (mamba)
- jGrowl to 1.2.14 (mamba)

For changes done previously, please see the in the 2.5.7 Beta 1 Release notes