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Changes in KVO behavior on SL?

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Changes in KVO behavior on SL?

Subject: Changes in KVO behavior on SL?
From: Kevin Brock <email@hidden>
Date: Tue, 01 Sep 2009 17:14:15 -0700

We've got an app that is using keyValueForPath: and observeValueForKeyPath:ofObject:change:context: to keep a status window up-to-date.

On 10.5 it works fine. On 10.6 keyValueForPath: is called exactly once per property. When we later create a change dictionary and send observeValueForKeyPath:ofObject:change:context: to the observer for a property, valueForKeyPath: isn't called again.

Is there a known change in 10.6 to how these functions are supposed to work? It's really odd, because all of our low-level code, including some KEXTs, works fine in 32 bit SL, but this one piece doesn't...


Kevin


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