7 conversion / repeating fields / sum

[commcase]

After converting to v7 my sum field doesn't work unless: I enter an number into the "quantity" field (part of the calculation leading to "sum"; or, all the repeating fields are filled. All the appropiate "do not evaluate if referenced fields are empty" boxes are checked. It seems that the calculation fields are trying to work because I see question marks in those fields ahead of where I am currently working. It worked in 6 just fine. I'm stumped. Any suggestions?

[-Queue-]

Can you post a zipped/stuffed sample of your file?