carpet1,
You said:
The file does contain an instruction in the default folder "Change..Never." When I tried to change this to 0 and save, finder could no longer find the file. I'm lost!
I too am lost. My previous instructions did not specify any file alterations. I do not know, nor did I specify that you should make any changes to the com.apple.desktop.plist file. The fact that the file was altered without a plist editor probably disrupted normal behavior.
If I open my com.apple.desktop.plist file with TextWrangler, I do see the following string...(YPlacementVChangeVRandom
PlacementKeyTag_ChooseFolderPathCollectionStringZ ChangePathZChangeTime^ImageFileAlias]TimerPopUpTag]ImageFilePathZFillScreenUNev er), but I do not know how to change specific phrases in this plist to alter desktop behavior.
Whenever a plist file is removed from preferences folder a new one will be regenerated to replace the old one after a log out/in or restart. That means you will have an old com.apple.desktop.plist file on your Desktop and a new com.apple.desktop.plist in your ~Library/Preferences Folder. You should be able to discard the old plist and allow the new one to resume normal default functions. Plist files should not normally be edited unless you know specifically with certainty what effect your changes will produce.
Repeat the plist removal procedure if necessary, but do not make any changes to the replacement file. Permission repair may be considered without penalty.
;~)