As it turns out i ran into the same issue with the 1.0 ide and ended up updating it myself.
I ran the examples and they seem to work just fine.
i do not know if you already updated the code or not but here is the a copy of the files i updated.
The example codes remains unchanged but is now in an ino file.http://soiling-detector.googlecode.com/files/DS3231updated.zip
Your orig lib and examples helped me understand how to get this IC up and running for my datalogger.
I have found a few of your sketches to be rather helpful.