Kunena-1.5 is a project mainly written in PHP and JAVASCRIPT, it's free.
Forum component for Joomla. Deprecated 1.5 Development Branch
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Kunena README
PLEASE READ THIS ENTIRE FILE BEFORE INSTALLING Kunena @kunenaversion@!
There is a handful of known issues, which are still being worked on:
The new URL auto-linking feature does not support special characters in domain names of URLs. For example, domain names with German umlaut will break the auto-linking process. Domains with such special characters are very rare.
Because Joomla 1.5.x requires a lot more resources than Joomla 1.0.x,
the upload and installation of Kunena may take longer than 30 seconds in a shared hosting
environment. Unfortunately, this is a very common PHP timeout setting. If you run into
this issue, you can increase the PHP timeout period from 30 to 120 seconds. See your hosting
provider for additional details.
Alternately, you may upload the entire package via FTP into a temporary directory. Then unpack the files and use Joomla's "Install from a directory" feature. This will eliminate the upload and decompress time from the install process so it will run in less than 30 seconds.
Should you exceed this timeout period, you must first uninstall the partial Kunena setup. Depending on at what point the timeout occurred, you might be required to delete the components/com_kunena and administrator/components/com_kunena directories by hand through either FTP or SSH access in your hosting environment.
For details about this release and how to install or upgrade to it please see:
http://docs.kunena.com/index.php/Kunena_@kunenaversion@_Read_Me