My cat poops or pees outside of the litterbox

This thread deals with a cat that poops on the floor.
http://www.pets.ca/forum/showthread.php?t=14538

This thread deals with a cat that pees on the bed
http://www.pets.ca/forum/showthread.php?t=9893

This thread deals with a cat that sometimes poops and pees on the floor.
http://www.pets.ca/forum/showthread.php?t=6914

A quick and easy tip that describes the main reason why a cat would pee outside of the litterbox.
http://www.pets.ca/pettips/tips-1.htm

Another pet tip that describes the differences between marking and urination
http://www.pets.ca/pettips/tips-47.htm

Here is an article that deals with inappropriate elimination in cats.
http://www.pets.ca/articles/article-cat_urine.htm