I have XAMPP on Windows7. after update the pear.php.net channel with:
pear channel-update pear.php.net
and try for installing new packages,
This is a bug that happens in combination of PEAR 1.9.x with PHP 5.5+.
Please upgrade to PEAR 1.10.0dev1 (or the latest 1.10.0dev2) which fixes this issue.