I posted a question the other day about the COUNTBLANK function because when
I used it to count the blank cells returned by the formula =IF(a1="","",a1)
it didn't work unless I deleted the contents of a1 twice.

I have now tried this on my home PC running Excel97 and I get exactly the
same fault as I do at work running Excel2000. Interestingly depending on the
order in which I set up the spreadsheet (either entering the formula first or
entering the A1 first) I can get the fault to occur on not. So I have
reached the conclusion that there is a fault with this functionality. Bob
Phillips mentioned that COUNTBLANK can't be used to count formulas returning
"" so is this a change in a later version of Excel?

Ian