Pivot table error

I ran into an interesting problem when working on a pivot table. I have one
row field and one column field, and each of them has a header label. If I
click on one of them, I get the filter drop-down, but all of my dollar
amounts change to #VALUE!. I don't see this anywhere on the bug list, and
from the documentation it looks like having the drop-down filters ought to
work.

Am I doing something wrong, or is this a bug?

Thanks,