Can't add favorites in finder sidebar
Hi,
I added some folders in finder sidebar a while back, and suddenly, they disappeared, such as the documents shortcut. When I try to put them back, finder removes it again.
Also if I go to Finder - Preferences and try to check the documents shortcut to appear in sidebar again, the checkbox doesn't work.
I'm pretty sure this happened after I synchronized my iPhone for the first time.
How can I add favorites to the finder sidebar again?
MacBook Air, Mac OS X (10.7.3)