Gruber wrote a great post about the new fixes for Spaces in OS X 10.5.3. I have been a big fan of Spaces, but have had the same problems with it that many have had. ex: Spaces switching without me wanting them to switch. Check out the article below.
This week?s release of 10.5.3 brought good news: Apple has addressed this problem with a few seemingly minor changes to Spaces. Apple?s release notes for 10.5.3 hint at the changes, but don?t explain them in any detail: [From Daring Fireball: Spaces in 10.5.3]