Must know a little about advertising history to really enjoy it.
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Anyone who uses Tiger or Panther who has found that suddenly files don't open in the apps they really want them to open in might find this thread useful. I had the problem of Illustrator EPS and Photoshop EPS being seing as the same and all opening in Illustrator. Basically it comes down to removing the LaunchServices prefs and cache files. But, make sure you read the thread.