Can't open .pkg files, and Installer won't work...
Whenever I try to open .pkg files, the installer logo appears on my dock for a quarter of a second, before vanishing. Whenever I try to open installer on it's own, the same thing happens.
Any idea as to how I can reinstall 'installer', or better yet, fix it.
Many thanks.
iMac, Mac OS X (10.4.9)