I haven’t gotten to the stage of creating plugins as it’s very difficult to ignore a 500 internal server error whenever I include your library.
I am using the two examples you have included.
plugins -> helloworld -> helloworld.php
plugins -> cimarkdown -> cimarkdown.php
plugins -> cimarkdown -> markdown.php
I have tried on two seperate OS’s, Ubuntu and Snow leopard. I have tried two different versions of PHP 5.3.3 and PHP 5.3.5 and I have tried with a completely new downloaded version of CI 2.0.2
As I mentioned I echoed out the paths before the include statement and they are fine and match the files perfectly.
I havent changed your file structure, I copied and pasted all the files very carefully.