Signs created in <1.9 show opening and closing quotes when displayed.
Signs created in 1.9 are fine unless the world is opened in 1.8(.x) at which point the quotes will appear on each time.
Linked issues
is duplicated by 24
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Comments 7

Created a world in 1.9, Added signs, closed world and opened in 1.8.8. Signs appear fine but when re-opened in 1.9 the signs have quotes.
Created a world in 1.8.8, Added signs, closed world and opened in 1.9. Signs appear with quotes.
Screenshot is of a sign added in 1.8.1 and opened in 1.9
Created a world in 1.9, Added signs, closed world and opened in 1.8.8. Signs appear fine but when re-opened in 1.9 the signs have quotes.
Created a world in 1.8.8, Added signs, closed world and opened in 1.9. Signs appear with quotes.
Screenshot is of a sign added in 1.8.1 and opened in 1.9
Note: this is also what happens when you downgrade 1.8 to 1.7. Also the word "Null" appears (in quotes) on any blank line.
Note: this is also what happens when you downgrade 1.8 to 1.7. Also the word "Null" appears (in quotes) on any blank line.