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Popular questions about Joomla! 2.5
Will my extension work in Joomla! 2.5?
That depends on the Joomla! version that the extension was developed for. According to Jean Marie Simonet very little compatibility problems are expected between extensions released for Joomla! 1.7 and those for Joomla! 2.5. Extensions developed for Joomla! 1.5 on the other hand will almost certainly need to be modified in order to work properly under Joomla! 2.5.
Should I upgrade my website to Joomla! 2.5?
Most likely: yes. Joomla! will end the support for Joomla! 1.7 after January of 2012 and for Joomla! 1.5 after April of 2012. This 'End of Life' status means that no (security) updates will be released for these versions after the mentioned dates.
Where can I find extensions for Joomla! 2.5?
On the same places where you used to get your extensions for other versions of Joomla!. Some sites will allow you to filter specifically on Joomla 2.5 compatible extensions. Of course you should always look for the 'Joomla! 2.5 compatible' icon before downloading or purchasing any extensions or templates that you intend to use for Joomla! 2.5.
What are the biggest changes in Joomla! 2.5?
The biggest changes are: advanced search and automatic notification of Joomla core and extension updates, the Joomla CMS for the first time includes multi-database support with the addition of Microsoft SQL Server. Read more about those updates in the blog on joomla.org.
Can I revert back to Joomla! 1.7 or Joomla! 1.5 after upgrading to Joomla! 2.5?
That won't be easy and will probably require an awful lot of custom work. Our suggestion is to make an informed decision about upgrading to Joomla! 2.5 and at all times make sure you have a recent and tested backup before starting the update process.