For this, you need to edit the file ‘meta-boxes.php’ located in wp-admin/includes/ folder.
Open that file in NotePad and find the following code:
$visibility = ‘public’;
$visibility_trans = __(‘Public’);
Now, all you need to do is change it do the following:
$visibility = ‘private’;
$visibility_trans = __(‘Private’);
Done.
via WordPress › Support » How to set new posts visibility to private by default ?.
ico files can contain multiple images at the same time. So you can for example put a 16×16, a 24×24, and a 32×32 image inside a single ico file. This way IE can use the image with the most appropriate size. So it will use 16×16 inside the addressbar, the 32×32 for the taskbar (pin), and the 24×24 for next to the back button. If you want them to look better on hi-dpi screens you could use 64×64 instead of 32×32, and 48×48 in stead of 24×24.
You could even use different kinds of images instead of the same image in differently scales; so e.g. just the logo on the 16×16 and 24×24, but the logo and brandname on the 32×32.
One tool for creating such icons is the commandline application png2ico, or icoFx if you like a GUI.
via internet explorer 9 – Where does IE9 look for the new large favicons? – Stack Overflow.