Speedcrunch uses the wrong system default radix character

[Mike Robinson]

I am running kubuntu 14.10 and in the system settings > Locale, I set the country to USA, the language to American English and numbers have English options (group separator is a comma, decimal separator is a dot). However in Speedcrunch, when I select system default radix character it is using a comma instead of a dot. In fact typing an expression using a dot produces a pop-up error (invalid expression). See attachment.

[Felix Krull (fkrull)]

Seems somewhat related to bug #366285; in any case, even in 14.04 KDE's System Settings doesn't properly set the locale environment variables for things like number format (LC_NUMERIC).