ÍPAddress does not name a type

In file included from /Users/stusmith6818/Documents/Arduino/libraries/Ethernet/Ethernet.h:5,
from TwitterClient.cpp:26:
/Users/stusmith6818/Documents/Arduino/libraries/Ethernet/Client.h:16: error: conflicting return type specified for 'virtual void Client::write(uint8_t)'
/Applications/Arduino-2.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Print.h:48: error: overriding 'virtual size_t Print::write(uint8_t)'
In file included from

And it highlights th IPAdress line in the sketch.

The message, though, has absolutely nothing to do with the IPAddress line.

When I open the Twit example, and compile, I get this "error":

Binary sketch size: 15666 bytes (of a 30720 byte maximum)

So, somewhere, you have put a library in the Arduino library path that you should not have put there, and it is causing your problems. I suggest that you uninstall 1.0, and reinstall it.

What's with the -2 in Arduino-2.app? What version of the IDE are you really using?

That example is not the brightest example that Arduino team has foisted off onto unsuspecting users.

const int requestInterval = 60000;  // delay between requests

Yeah, right. That's a valid int. NOT!