admin settings revert to blank

I have not had this problem until just recently. When I am in "admin/configurations/maximum values" there are several blank fields like "products listing - number per page" or "maximum categories products display list". I can edit them and enter a number. The number will show up after selecting update. But later the number will disappear and the field is blank again. Of course, when looking at the debug log i see "division by zero" which I understand reflect the blank fields. Help, Grandpa

GrandpasToys:

I have not had this problem until just recently. When I am in "admin/configurations/maximum values" there are several blank fields like "products listing - number per page" or "maximum categories products display list". I can edit them and enter a number. The number will show up after selecting update. But later the number will disappear and the field is blank again. Of course, when looking at the debug log i see "division by zero" which I understand reflect the blank fields. Help, Grandpa

Problem Solved! At least for now. We will see if it sticks. I had to edit my database with phpMyAdmin. The problem was that I was editing the wrong database. When I located the correct one it had blank fields in the same spots that were in my admin/config/maximum values. When I entered the numbers I wanted with phpMyAdmin, they showed up in my admin.

So... what happened to cause> I have not had this problem until just recently.There should be no need to edit the database under normal operation.> Problem Solved!I think I would look a little deeper before declaring victory.