From the PCC website:
Various individuals and organisations (including Rethink and Shift) complained that the newspaper had used the word 'Schizo' in reference to a patient suffering from paranoid schizophrenia. The complainants said this was a pejorative and discriminatory description of the patient's mental illness.
Surely a breach of Clause 12 of the Editor's Code of Conduct? It says:
i) The press must avoid prejudicial or pejorative reference to an individual's race, colour, religion, gender, sexual orientation or to any physical or mental illness or disability.
But the PCC haven't ruled against the Sun. Oh no. Instead, they've got this less-than-cast-iron assurance:
The matter was resolved when the newspaper agreed that it would use its best endeavours not to use the term 'schizo' in the future.
No doubt the paper is terrified of what the PCC will do if they use the term again in the future.
Incidentally, searching the Sun's website for articles containing 'schizo' finds 14 results, dating back three years.