Some currencies are missing support for their unicode currency symbols. For example:
French Franc: ₣
Italian Lira: ₤
Phillipine Peso: ₱
There are also a few Unicode currency symbols (see U+20A0 to U+20B5) that apply to currencies in existing circulation but that aren't currently supported by qalculate at all.
Anyway, you may want to consider adding these! =)