Hi
I had Joomla 2.5.8 + K2 2.5.7 + PHP 5.2
I ugdraded PHP to 5.3
Since then on my modules BNR and Split Content I get warning errors saying "paramater 2 to plgK2Example onK2BeforeDisplay () expected to be a reference, value given in .... /libraries/event/event.php on line 71
I was unable to find a fix
Could someone help please
Thanks

What is weird is that :
1/ if I downgrade it back to PHP 5.2, Split Content works again,
2/ on another server for another site I have PHP 5.3 and split content is fine there !

I finally found the solution there : forum.joomla.org/viewtopic.php?f=628&t=715408

need to in file:
/libraries/joomla/event/event.php
replace [line 71]:
return call_user_func_array ( array($this, $event), $args );
with:
return @call_user_func_array ( array($this, $event), $args );