since migrating to Xcode 4 I am totally perplexed by the debug view inasmuch as I am unable to see the values of arrays / dictionaries etc.
Under Xcode 3 I could view debug console and see the actual values stored?
Debugging information now appears in the debug navigator (Cmd-5) and the debug area (Shift-Cmd-Y).
You can have these areas show up by default when you run the application (or hit a breakpoint) by toggling the options in the "Behaviors" tab of Xcode's preferences.