"Calendar" Folder created during the adding of Appointments to theCalendar system fodle in German Client Version

Hello,

We've had a bizarre behavior appear at one of our customers which we
can't reproduce in our test environment. Our application is interfacing
with a Groupwise 7 system via the Groupwise Object library. It is adding
appointments to the Account.Calendar system folder to Groupwise
mailboxes. At this one system, on which the German version of the client
is installed, after adding such an appointment, an empty folder named
"Calendar" is created and the added appointment shows up in the regular
calendar folder, which is named "Kalender" (german for Calendar). We do
not create this folder via the object API and it only happens within one
specific system (so far). On said system the english version of the
client was once installed.

Has anybody encountered similar ghost folders?

Best regards, Martin Schmidt.