Been trying to solve why my little application doesn't work with some Samsung phones. I have heard mix results of it sometime working correctly, sometimes synchronising to the 'Most Visted' menu and sometime none of the above.
From the reports I've had, it looks like 2.1 works fine, but the 2.2 upgrade stops it working - for some unknown reason.
I currently do not have access to a Samsung device to test/debug/replicate the issue. I have even downloaded the Samsung TAB SDK and check that it work with this - but this isn't a real device.
The only way of really solving this is to either have direct access to a Samsung device or to add lots of debug to the application and log this information. Even then it would be a long process of updating/testing to check if the solutions worked.
I will try and investigate further and keep you posted.