Thanks .I'll try again last time i updated to the latest firmware i had a heap of problems.I got brave and decided to update everything...the P4P+ RC and the P4P.
Updates went smoothly. Only hiccup was the RC update stalled once at 47%. Did a reboot and it finished with no issues. The AC updated without a hitch.
Just returned from a 20 minute or so flight test, all done in P mode. (Test was in a somewhat confined space.) I shot a dozen or stills and three short videos. No inversions on the camera when shooting directly down, for either photo or video. No mysterious orange tints seen on stills or videos. Didn't try panoramic mode; will test that later.
The AC flew normally, save for a tiny bit of drift when above 20'. I contribute this to somewhat gusty wind conditions more than any AC issue. I'll watch for this in the future when flying on calmer days.
All in all, everything seems fine.