we have added a custom field to emails with the following code through
the Object API using C#:

FieldTypeConstants.egwString, "ok");

In a specific Groupwise System, corrupted versions of this field show up
at random times. Sometimes the "w" in "nagw_Archived" is replaced by a
special character shown as a rectangle, other times it is missing, and
there are versions that a re jumbled worse.

The corrupted versions of the fields never contain any values, although
we always add a value, whenever we add the field to a message.

How are these corrupted fields created? How can we get ridd of them?

Best regards, Martin Schmidt.