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Yep, you're right. On both 2.3, and 2.4, I get:
>>> import MacOS
>>> print MacOS.GetCreatorAndType('/Applications/TextEdit.app')
Traceback (most recent call last):
  File "<input>", line 1, in ?
Error: (-43, 'File not found')
When will appscript be incorporated into the standard libraries?
- Jurjen