I checked out this link...the red box still appears even after the strict mode setting is unchecked under the developer options. This happened as soon as my phone updated to jellybean. Any ideas?
A lady in my office upgraded to the S3 over the weekend. She is having the same thing. I have not seen it before on mine. She said it happened once she upgraded to 4.1.1
I had same issue. Back up & reset & the red box is gone. I havnt used updates after reset. Its the last update in urly dec. 2012 that is the culprit. Samsung knows about the issue & will address it in the next update.