I was experiencing the same problem and thought it was a Mac thing. Come to find out, somehow the permissions on my preference panes was not letting me save anything. I was having trouble saving anything on my Mac. So, you might try this, it finally solved all my problems. First, so that you know you are in the right Library. Go up to your Finder and click on preferences. Next, click on the "sidebar" and then scroll down the list and click on the "Hard Discs", your Machintosh HD will now be in your Finder Window List down under devices. Click on that and go to Library. Do not go to the Library in the System folder. Now highlight the Libraray folder, do not open it, and then go up to the Finder and go to File, scroll down to Get Info. Look at the bottom and see what permissions you have. If it says you only have read only permission, then you have to make some changes. First you have to unlock the window. Click on the lock, lower right and put in your computer password. That should open the lock. Then click the + at the bottom and add Administrator to the list, unless Admin is already there. If it is, then highlight that and click on the gear to "Apply to enclosed items". I also did it for my Users folder under Machintosh HD window as well because some things got munged up in there as well. Lock the lock and go back to everything and make you changes and see if they don't stick now.
Really hope this helps a lot of you.
Roger
