I am having problems with Excel 2007 that I did not encounter in
previous versions of Excel.
Symptoms:

Using statistical functions, such as COUNTIF and SLOPE, the result is
strange: An error message pops up: "Too few arguments" when there are
enough arguments. This happens whether I use the statistical function
generator or type the command directly.

I can take the same worksheet to another computer with a previous
version of Excel and use the commands just fine. When I then take the
worksheet back to the computer with Excel 2007, the cell with the
function command is fine unless I click on the cell -- and then get
the same "Too few arguments".

I am confident that there are not "Too few arguments" when using the
function (I've had many check my work).

This is like a bad joke -- I am a stat nut who can't seem to get Excel
to produce stats.

Any suggestions? I've uninstalled and reinstalled Office 2007 twice
now, with no improvement.

Any suggestions? I've uninstalled and reinstalled Office 2007 twice
now, with no improvement.

Excel 2007 is extremely buggy, especially its VBA, and slower than
previous versions.

I'm afraid you may only have 2 options: use Excel 2003 or keep your
fingers crossed and wait for the first service packs for Excel 07 :(