what is main difference in joomla 1.5 and joomla 2.5

- Joomla Smart Search
You will be able to do search through your content in a smart manner and it will also come up with Search Suggestions like Google.

- Multi Database Support
It will be possible to run Joomla on MySQL as well as on MSSQL(Microsoft SQL)

- More choice for Offline Modes
You will be able to choose a custom message for Offline Mode and also use image.

- User Registration With Captcha
It will be very useful thing to stop spam registrations. Joomla 2.5 will have Captcha powered Registration Forms.

- Mobile Enhancements
Default Beez template will come up with mobile enhancements.

- Multilanguage Support
Now, there will not be any need of using any 3rd party component for Multi Languages. Default Joomla installation will have Multi Language support in Joomla 2.5.

- Subcategory Filter
Category Filters were there but now in Joomla 2.5, sub-category filters are also added so you can find articles of a sub-category also.

I think the activation link problem in joomla is also solved to a certain extended.

there has been an error processing your request in magento [SLOVE]

there has been an error processing your request in magento (salutation)

You should be set the cache folder tmp
Open magento/lib/Zend/Cache/Backend/File.php and look for:

protected $_options = array(\'cache_dir\' => \'null\',

5-Change it to:

protected $_options = array(\'cache_dir\' => \'tmp/\',

then you go this error : like "exception printing is disabled by default for security reasons. magento"

1-Navigate to the \"errors\" folder. 

2-Change local.xml.sample to local.xml 

then enloy