[Orgmode] Strange problem with spreadsheet

[Cecil Westerhof]

I have the following tables:
|-------------------|
|             22.50 |
|             16.50 |
|-------------------|
| :=vsum(@address@hidden) |
|-------------------|
#+TBLFM: @3$1=vsum(@address@hidden)

|------------------------|
|                  22.50 |
|                  16.50 |
|------------------------|
| :=vsum(@address@hidden);%.2f |
|------------------------|
#+TBLFM: @3$1=vsum(@address@hidden);%.2f

With the first I get '39.' when I let the table be evaluated.
But I want 39.00. That is why I created the second table. But here I get
on evaluation: 'Args out of range: 15,16'.

I have the feeling that it could have something to do with the upgrade
to 4.78, but I am not sure. (Before I was using 4.71.)

-- 
Cecil Westerhof <address@hidden>