We are aware of login issues. It is a problem with Facebook and they are working to fix it.
Facebook Security for Profile Pictures
Some of your friend's profile pictures may not be able to be downloaded by FriendSync. There is a setting within Facebook that allows or restricts 3rd party applications like Facebook access to your profile pictures
You will need to follow the steps below to allow your profile pictures to be downloaded by FriendSync.
1. Login to Facebook.
2. Hover your mouse over the "Settings" menu and select "Privacy Settings".
3. Click the "Applications" link.
4. Click the "Settings" tab.
5. Under "Share my name, networks, and list of friends, as well as the following information" make sure Profile Picture is checked.
6. Click the "Save Changes" button at the bottom of the page.