Checkbox works in R5, not R6?

I have an old database app that I am maintaining. A form has a checkbox field that is “computed for display”. The default value field values are not being displayed. Actually I can’t even set the checkbox from a postopen. This all worked in rel4 and rel5 ? (the application code has not changed). We have probably 15 people or so who have moved from R5 to R6 that are now “broke”.

Subject: I had something similar happen

except that all of mine “broke”. I ended up copying and pasting a clean, still working version of that field (which I had used in another form) in, and deleting the “old” one. don’t know why but it worked and seemed to clean up the “corruption”. hth Cathy