Ctrl+Shift+Left twice followed by Shift+Left resets selection in Interpreter pane

This is the same issue as 
http://code.google.com/p/pyscripter/issues/detail?id=449 but for the Python 
Interpreter pane rather than the main window.

What steps will reproduce the problem?
1. Type some text "Example text here" into the Python Interpreter pane.
2. Position the cursor at the right hand end of "here".
3. Use ctrl+shift+left arrow to select "text here".
4. Release ctrl and use shift+left arrow to continue selection one character.

What is the expected output? What do you see instead?
Expected selection " text here".
Actual selection is just the space before "text".

What version of the product are you using? On what operating system?
2.4.1.0 Windows XP

Please provide any additional information below.
ctrl+shift+left, ctrl+shift+left, shift+right also fails.

Original issue reported on code.google.com by ttt...@gmail.com on 24 Jan 2011 at 11:53

masroore / pyscripter

Ctrl+Shift+Left twice followed by Shift+Left resets selection in Interpreter pane #474