Whilst debugging in Xcode_3.1.2 I am pretty sure I could see the contents of my NSString arrays. However after upgrading to 3.2 I only see the following ...
I am not sure if this helps but if you select the array value to wish to see in the debugger window and the go to the Menu : Run > Variables View > View Variable As
you can change it from "NSCFString *" to "NSString *". You then see the value so "Planet_1" for example.