ITunes Artwork isn't recognized for Screen Saver module in System Prefs

Question

I believe this happened imediately after upgrading to iTunes 9, but it's possible that it started with 10.6 or 10.6.1 and I didn't notice. Other screen savers including iPhoto Library appear to work normally.

Answer 1

Make a temp backup copy of the library and try the following;
1 - open your library via the finder like this:
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2 - move the AlbumData.xml and the AlbumData2.xml file to the Trash.
3 - delete the com.apple.iApp.plist file from your User/Library/Preferences folder.
4 - launch iPhoto and create a new album.
5 - open the System/Screensaver preference pane and see if you can see the albums.
Another test you can preform. Log into another user account on your Mac, create a iPhoto library (if there isn't one already), go to the Screensaver pane and see if you can see the albums. If not it's a system wide problem. If you can it's limited to just your account.
If it is just your account it could be a preference file other than iPhoto's that's causing the problem. Here's how to determine if that's the case:
Trouble Shooting Preferences in Leopard
1 - Create a folder titled "Preferences A" on the Desktop.
2 - Open the working Preferences folder, HD/Users/your_name/Library/Preferences, and move the contents to the Preferences A folder on the Desktop.
3 - With the working Preferences folder empty run the application again and determine if the problems is fixed.
NOTE: you may have to drag the contents of the working folder to the trash and empty if moving the contents to the A folder only copies them instead of moving.
4 - If the problem is fixed:
A - open the working Preferences folder (HD/Users/your_name/Library/Preferences).
B - Open the Preferences A folder on the Desktop, select all of the contents and drag them into the working Preferences folder.
C - When the Copy window pops up check the "Apply to All" check box and then click on the Don't Replace button.
Click to view full size
5 - If the problem is NOT fixed, empty the working Preferencess folder and move the contents of the Preferences folder on the desktop back into it.