My wife has outlook and she forwards things to me like appointments. Is that what your talking about? Also I tried to download yahoo sync and I dont think it worked. If it did? How do I get rid of it?
First of all, that message doesn't mean that sync isn't working. It is still working fine. However, a few (maybe just one) item was changed by another program and GSync will not update items that are being changed from elsewhere.
Is you wife making changes to the Same Google Calendar (same account name) that you are? If so, that may be the problem. If she changes an appointment, then when you run Gsync from the BBerry it might show that message.