It has come to our attention that more and more developers are back porting Joomla 1.5 code into Joomla 1.0.x components :-) 

While this is good for code reuse, it can made compatibility a nightmare.

An example is with Tags/KB and JoomFish

If you are getting the error:

Fatal error: Cannot redeclare class JRegistryFormatINI in /home/domain/public_html/new/administrator/components/com_joomfish/libraries/joomla/format/ini.php on line 23

Then you have fallen foul of this :- )

 The easy fix is to edit the file:

/administrator/components/com_joomfish/libraries/joomla/format/ini.php

and before the class declaration (thats the line that starts "class JRegistryFormatINI extends JRegistryFormat") add the following code:

 if (!class_exists('JRegistryFormatINI')) {

 then right at the bottom of the file before the closing ?> add another } brace like this:

 } ?>

Save the file and upload it again and the conflict is resolved.