JCE 2.5.4 has been released. This update fixes a few bugs we missed in the 2.5.3 update, and adds improvments to file screening on upload.
Bug Fixes
A full list of fixes are listed in the Changelog
Download and Installation
Instructions for installing and updating JCE for each Joomla version are available here
JCE can also be updated from previous versions using the JCE Updater in Joomla! 1.5 and 2.5 or using the Joomla! Update Manager in Joomla! 2.5 and 3