Looks like the error is in the function show_utwp_profile_widget in the php file.
The line echo $after_widget; should be at the end of the function. Instead, it accidentally got left outside the function.
Just move that line up above that last curly brace, and it works.
To anyone else is having this problem :
If I’m reading this right, it looks like the problem has been identified and fixed. (Bug ticket #22944)
Just have to be patient and wait for version 3.5.1
Thanks Frumph.
Odd,though. That post is from September. This was working fine for me until 3.5. (I should have mentioned as much. )
Very frustrating to lose functionality like that, but I’ll try doing it the way you suggest. )
(If any developers are reading this, I’d like to suggest that it’s dangerous to allow iframes in previews and live post editing, but then strip then out of scheduled posts when they go live. That’s the worst possible time to make changes without the user’s knowledge! )