Getting rid of the Finder's 'Open With' duplicates
 

"This is the problem: You want to open a file using something other than the default application. You right-click its icon in the Finder, choose Open With, and a submenu pops up with an absurd number of duplicate entries." This is so annoying. Dr. Dang made a little addition to .bashrc so you can fix it with a single command. Now it's up to Apple to actually fix the problem (via Daring Fireball).

http://osnews.com/story/26799/Gettin...ith_duplicates