When I updated to 7.1, the first feature I tested was Unicode.
Certain UNICODE symbols work, ie; δ [Greek letter: Delta]
However, certain other symbols, such as → [Material implication, used specifically in Mathematical Propositional Logic], show up as a black-square in the 'typing bar', however the correct symbol is shown within the 'chat window'.
Please fix this bug in your next release.
Thanks in advance,
Chip D. Panarchy