When I write the quest notes, PS always crashes. And it doesn't crash when I write in the first edit. It is always at the second quest I select. Here is what I do:
1. open quest window
2. Select a quest
3. Write a note (doesn't crash at this point)
4. Select another quest
5. Write a note (and at the second letter, it crashes)
I have a format for my quests and here it is:
Levrus, Magic shop, near hydlaa and at the gold mines
-= PART 1=-
Bring 1 Gold Ring
Gold Ring given by NPC in TOWN when finished the quest were you need to bring ITEM(S) to the NPC
-= PART 2 =-
Bring 10 Diamonds
Information can be obtained from NPC in TOWN
...
I always bug in the letters marked in red and only if I wrote a note for another quest before and that I am now adding a new part for this quest (it is an example)
EDIT: It ALWAYS happens at the 2nd letter I type of the second note I write