Excellent news everyone! They've released an update for Editra with the bugfix for the issues I submitted.
So now PyScripter and Editra do exactly what I need, but since Editra is updated it isn't buggy. =] Editra has tabs (in the right place!), syntax-highlight, shortcuts to run code, embedded interpreter, syntax-highlighting and code-completion. Thanks for all the suggestions, glad I found the right one! Cheers, Alec Taylor -- http://mail.python.org/mailman/listinfo/python-list
