[Orgmode] formula question

[henry atting]

Since the last upgrade of org-mode (now 6.16) when I do a `C-c C-c' on
`=' in a table field I am always prompted like this:

    replace field formula with column formula (y or n)

The formula is a simple addition of the amounts of the preceeding
fields:

    #+TBLFM: address@hidden::$3=$1+$2

Before the upgrade I never got that (useless) prompt.

henry