WHY DO I HAVE TO MOVE MY SITES FROM JOOMLA 1.5?
The longer answer is you probably really want to move your sites. In my opinion, the sooner you move them, the less pain and risk you'll feel in the long run.
Joomla 1.5 reaches its end of life in April 2012. After this point, no more security releases for Joomla 1.5 will be available. If a security issue is found in Joomla 1.5, it will not be patched by the project.
There's also an issue of support. Shortly after Joomla 1.0 reached its end of life in July 2009, we saw many 3rd party developers stopped supporting extensions for Joomla 1.0. I expect we will see this same trend after Joomla 1.5 reaches its end of life, with most 3rd party developers dropping Joomla 1.5 support for their extensions within a year, probably by April 2013. This means if you need to add new functionality to your Joomla 1.5 website, you'll find that pretty difficult if you don't upgrade.
Nine Questions When Preparing Clients for Joomla 2.5 :: Joomla! Community Magazine™
Copying a Joomla website
Display module positions in Joomla 1.7
index.php/?tp=1 works for Joomla 1.5, but how do we show them in Joomla 1.7 and 1.6?
One of the many changes in Joomla 1.7 is the fact that the url to view module positions is no longer enabled as standard. As a web designer who sometimes wishes to know where module positions are, especially if you are using a commercial or free template you have not constructed yourself the ?tp=1 code was vital.
Joomla 1.7 now disabled this functionality by default on a new Joomla 1.7 installation. But hope is not lost it is a simple change to activate again.
1. Firstly login to your Joomla website.
2. Navigate to the Extensions / Template Manager menu option.
3. Click the Options button, top right.
4. You can now click the Enabled button and Save and Close.
5. Now you can add index.php?tp=1 to your public url and the template positions will be displayed.
6. Don't forget to diable the ability once you have completed your tasks.
Hope that helps solve some frustrations and helps you understand Joomla 1.7 a little more!
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Multiple Vulnerabilities in Joomla! 1.6 and 1.6.1 - Search the Go Daddy Help Center
Issue: On 07/27/11, information disclosure and clickjacking vulnerabilities were reported for multiple versions of Joomla! The information disclosure vulnerability lets attackers use the index.php script to discover the absolute path to Joomla! The clickjacking vulnerability lets attackers display pages from a Joomla! 1.6 or 1.6.1 site in frames on a specially crafted third-party website.
Resolution: Joomla! 1.7 is available. For more information, visit the vendor's website: http://www.joomla.org/.
This information was compiled using information in the National Vulnerability Database. For more information about this issue, see the following summaries:
CVE-2011-2891
CVE-2011-2892
Website Protection Site Scanner scans for this vulnerability, and many more. To learn about Site Scanner, see Getting Started with Website Protection Site Scanner."
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Information Disclosure Vulnerability in Joomla! 1.5.23 and Previous
Affected Application: Joomla! 1.5.23 and previous.
Issue: On 07/27/11, an information disclosure vulnerability was reported for multiple versions of Joomla! The vulnerability lets attackers use the view.html.php script to discover the absolute path to Joomla!, which they could use for additional attacks.
Resolution: Joomla! 1.7 is available. For more information, visit the vendor's website:http://www.joomla.org/.
This information was compiled using information in the National Vulnerability Database. For more information about this issue, see the summary for CVE-2011-2890.
Website Protection Site Scanner scans for this vulnerability, and many more. To learn about Site Scanner, see Getting Started with Website Protection Site Scanner.