"+" in time signature does not appear in Gonville

Defining a compond time signature such as 4+2/4 by using 6/4 as the undelying signature and specifying 4+2/3 in the text boxes, does not render correctly in Gonville. The new time signature appears correcly in the pallet but on dropping onto a stave renders as 42/4. ie the "+" sign is omitted. This applies only to Gonville.

Reported against 2.0.2 under Ubuntu.