You need to make sure that file twitter.txt can be created in the root of your Wordpress installation. If not, create a blank one (right along side wp-config.php) and set the permissions/chmod to writable (or "664").
Is it possible that the accents on letter are not showing up right? Take a look @ this: http://www.fredranger.com/blog/
Original tweet was: "Buuuuuuuuuuuuuuuute sauve notre soirée! Wow! Quel façon de répondre à l'arrogance de Miranda #fb #boxe"
And it comes out like this on the blog: "Buuuuuuuuuuuuuuuute sauve notre soirée! Wow! Quel façon de répondre à l'arrogance de Miranda #fb #boxe"
Open function.php, find line 585: $status = $status.' <a style="float:right;font-size:0.7em;" href="http://twitter.com/'.$twitter_id.'/">~ '.$twitter_id.'</a>'; and add this line directly below it: $status = ereg_replace("&", "&", $status);.
Hope that works! You may need to wait a bit for the cache to update or delete twitter.txt in the root Wordpress folder.