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Joomla Warning: Parameter 2 to frontpage()

The error: Joomla Warning: Parameter 2 to frontpage() can occur when you use an out-dated install of Joomla with newer version of PHP. As always we recommend updating your scripts but if you require a quick fix before you update your coding you may use the following:

And this was the solution posted in the Joomla forums: (Cedit goes to Kjell Hhlen.)

I wrote a fix. My version is Joomla 1.0.13 but I suppose it will not be very different for later versions.

You sould replace two files by the ones in the attachment:

/includes/Cache/Lite/Function.php
(this solves the Reference instead of value-problem)
/includes/vcard.class.php
(to make the contact form work again)

If you rather add the changes by hand:
The changes to vcard.class.php are minor, look for:
Code:
if(!function_exists(quoted_printable_encode))

In Function.php I added a this line twice:
Code:
$arguments = $this->fixCalls($arguments);

The new function (fixCalls) is added at the end of the file.