Had this error when trying to connect to Google Analytics via their REST API.
The issue is caused by Google being suspicious of the new request origin.
The solution i found was to go here in a browser: https://accounts.google.com/DisplayUnlockCaptcha and then try again. it seems that visiting this in a browser and logging into your Google account will unlock it for a few minutes and allow access from the new location.
For those of you getting the ‘Entity is not org-accessible’ when saving code in the eclipse IDE I found that the error was in fact code related, typically an incorrectly assigned object, or at least it was in my case.
If you are trying to establish in your app if your user has iCloud enabled and your app keeps crashing with unrecognized selector error, then it is probably because you are trying to test on a device or simulator not running ios 5.
I use the following method which first checks if the method is available on the users device: