The simple fix works just fine..... but i sure wish someone with knowledge of programing and this program would fix the cause of the problem.
Here is some information that may shed some light.
I have my shopping cart let's call #1 and carts #2 to #7 that are my dealers shopping carts the difference being as follows:
I developed the shopping cart # 1 first adding mods and deleting some of them, Super Orders being one mod that I removed. Ran into problems getting Google Checkout to work correctly and was removed.
After #1 cart was working correctly I downloaded it and used it as a master to make shopping Cart #2 to #7. The difference being #1 cart was the main office shopping cart and all other were different dealers. Dealer cart only had changes to reflect different locations, names, and phone numbers and data base. All orders being process used the same USPS account and credit cards mod.
So on cart #1 had to set the return address zip to "other" with zip as "00000" then click on "Same as return" for USPS autofill to work.
On all dealer carts it is set "Same as return" and have never had an error on these carts, they fill in the information correctly being used daily since last July 2009.
Bottom line is all carts are using same mods but each cart uses it's own data base.
I think at one time about a year ago I downloaded one of the dealers carts (#2 - #7) changed name, address to be my cart and tied it back into my existing data base and it still gave this error.
So now I assume it has something to do with data base. Maybe one of the mods that was being tested on #1 cart put something in cart #1 data base that USPS autofill does not like and is still there in cart #1 data base, So when the dealers carts were made with a completed working #1 cart there data base would not have been effected when they were created.
How would you go about trying to compare what is different in the data bases that causes the USPS autofill error? Or does someone have any other ideas on what to check. I wonder if all persons having this problem if there is one mod each are using?