Maybe it's something else that happens with the patch?
To clarify for my case - I haven't done the newest patch yet, just the first NL patch.
I get "jagged line" conversation balloons whenever I use the new "Bad Mouth" option in the Talk menu.
I have a couple of sims that were involved in a cheating relationship, and so now they can bad mouth each other because they are mad. They always start the action with a ballon showing the subject they are bad mouthing, but it is immediately followed by a jagged line balloon. I've examined these sims' memories and can't find anything obvious that would set this off.
Kind of annoying.
I haven't actually used Bad Mouth yet - you think it tries to use the memory of the event that caused the furiousness? If it was something like puddles or catching a Sim Woohooing - which doesn't count as cheating, though a flirt in front of them does, bah - there wouldn't be a memory to reference?
This is probably totally wrong, considering I haven't done any coding
but it's a guess, anyway.