Previously, the screenshot property list could be found at:
~/Library/Preferences/com.apple.screencapture.plist
In Mavericks, this file no longer exists. In the past, I used to be able to manipulate the location and image type of screenshots using the .plist mentioned above. Where are these values now stored? Do I now need to create the plist in order to manipulate these variables, IE:
defaults write com.apple.screencapture location ~/folder/of/my/choice
To be sure this was not an issue with my user account, I created a new admin. account and tested.
Best Answer
Yes, the plist seems to no longer exist by default, however I have changed my save location using the same command that you provided in your question and it's worked fine — the plist is read by OS X after logout and login.