New to Python, acquired Raspberry PI. Upgraded and now have IDLE and IDLE3.
Python 3.2.3 (default, Mar 1 2013, 11:53:50) (GNU 4.6.3] on Linux2

First task, New Window to create "Hello, World!"
Using IDLE3, created file helloworld.py
Using Run/ Check Module - failed with syntax error on the closing double-quote
Tried space before ending double-quote - failed
Tried reducing string to "Hello" - failed
Removed training end-of-line - failed

Closed IDLE3 and started IDLE
Loaded file as before - worked as expected

Restarted IDLE3 - still failed

Tried command-line "python helloworld.py" - worked as expected

Any ideas ?