It appears, that a function, which was supposed to encode characters like '<', '>', '&' to '<', '>', '&' does not work!
The affect to application was quite small, thus it was not discovered earlier.
It's hard to tell yet, how many places were affected, for now the only known place, aftected by this is:
gnote --new-note='&bug'
This fix and some more to come to you with 0.8.2!