My finder window when in columns view is stuck and will not display in alphabetic order. Choosing "arrange by none" or "arrange by name" results in some order I cannot determine--perhaps date modified. I somehow caused this to happen, I think, but I can't get it to work properly. Can anybody help?
Most likely ~/Library/Preferences/com.apple.finder.plist. If that isn't it, make a new folder on the desktop, move half of the items in Preferences to it, and check if it recurs. Continue this process until narrowing it down to a single file.