How to Remove the Capital ‘P’ Function From WordPress 3.0
This function changes all instances of WordPress spelled with a lowercase P to an uppercase P. Many users don’t wish to have their content changed and beyond that, there have been several bugs associated with this function, such as broken URLs.
For a full explanation of the issue, check out Justin Tadlock’s article, from which I gleaned the fix to the problem:
Add this to your theme’s functions.php file:
remove_filter( 'the_content', 'capital_P_dangit' ); remove_filter( 'the_title', 'capital_P_dangit' ); remove_filter( 'comment_text', 'capital_P_dangit' );