The permission system in Mac OS X can at times be truly weird. Today, when I was going to update iScrobbler, I tried to do a plain replace of the application in the /Applications folder. My daily user is currently set as an administrator account, so that should be quite easy. When I dragged the application to the folder, Finder asked me if I wanted to replace the existing application and I confirmed this. Then I was told that I didn't have sufficient permissions to complete this task. Since the previous version was installed with my ordinary admin account, I didn't think that much of it.
The weird issue here is that I was allowed to delete the existing app by dragging it to the Trash, and then copy the new one to the application folder. Since my current account was not allowed to replace it, why was I allowed to delete it?
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