I tested the demo on Win2K. The console showed an error, when I tried to "Inserting new Items...":
1234567891234567
Produces in the console the following trace:
Traceback (most recent call last):
File "C:\temp\ExtendedChoiceDemo.py", line 494, in OnInsertChoice
self.choiceicon11.InsertChoice(newitem)
File "C:\temp\ExtendedChoice.py", line 1360, in InsertChoice
self.SetValue(inputchoice)
File "C:\temp\ExtendedChoice.py", line 1508, in SetValue
raise "ERROR: Input Label Is Not Present In Initial Choices"
ERROR: Input Label Is Not Present In Initial Choices
One char less and it works...
Have a nice day,
Marco