First move tonight was setting the environment on Vista. I used to have my Vista PC at work and running Habari in XAMPP under Vista was a known issue. Today I was lucky as I got Habari installed within 5 minutes and the issue on loading plugin page in admin has gone! Next was Tortoise the SVN client I use for Windows. I checked out the latest r1276 and naturally put my modified K2 theme in it for another test. It didn't work as expected.
I then changed only at line 15 of
$theme->header(). I must be lucky today the theme worked?
There you are the theme is almost untouched except that line in
header.phpand it's working. I'll still be following Owen's wiki to modify my custom theme functions as a practice.