Corrupt replica problem

I have a Access97 database that is a designmaster that only I have access to and the users works with a set of replicas. It works well almost all time.
But sometimes there occour some replication errors between those replicas and its only
2 tables that are involved. If it's syncronization error there's no problem to solve it but when it's a data error in a memo field the only way to solve it is to delete all records in the design master and copy all records to it(except for the corrupt ones) and then manually recreate the corrupt record. After that I create a new set of replicas.

Here's my last problem:
When I tried to do it yesterday everything looked right until I tried to open the 'recreated' replica. Access crashed immideately when I tried to open the database.
The error was this:

"Microsoft Access - Application error"
"The instruction at '0x651a3460' referenced memory at '0x00000072'. The memory could not be 'read'".

It doesn't matter if I use a computer with NT4 or W2k.
I temporary solved the problem by copy my design master to the users.

Can someone give me a clue what might have happend?

/Brel