Was the quest "I Fought the Law" fixed in the recent patch? Previously if you took the path to help the NCR to retake the prison and succeeded, this victory was always considered a loss on both the radio and end game cinematic.

No quest fixes for this part of the patch so far as I know. Engine bug fixes only, no changes to the ESMs or BSAs.

Full patch is likely due next week.

Yeah this patch was an incrimental patch that adressed some critical issues - the most serious of which was probably save game corruption.

A comprehensive patch is due to come out soon and should address many of the identified issues.