Outlook Sync Issue Duplicate Entries

[inkognito]

hi,

i've been playing around w/ the outlook sync feature.

but i ran into massive trouble.

i draged an outlook folder to ur (stored not linked).
after the initial sync everything seems ok. but
each time i hit sync again all the contend is doubled!
means in ur and ol. so after 3 times syncing a folder
with e.g. one item i've got 8 items in ol and ur

i'm using ur 3.1 and outlook 2k3 wxpsp2 and w2k3sbs (german).

any ideas what's going on on my system?