Sometimes the simplest things can be a real pain.  I'm building an app that needs to use OAuth to login to Twitter.  I'm also using CodeIgniter as my PHP framework.  Haughin made a nice library for CI, but for the life of me I couldn't get it to retweet.  It was driving me insane.  After trying to find another library I sucked it up and dove into the code to see if I could figure out what was wrong.  After a while I found it, the retweet api call has 3 segments, but the library only handles 1 or 2.

One of the most annoyning things in Expression Engine is the use of index.php everywhere, but there are several tricks to remove it.  All of them can be found on this wiki page.  I used the LG .htaccess Generator extension and haven't looked back since.