I was attempting to use the transaction features in SF today and found a bug, if you look at the save method in BusinessLayer.vb

Public Overridable Function Save(ByVal Transactional As Boolean) As SaveUndoResult
Return Save(False, DEFAULT_TRANSACTIONKEY)
End Function

I believe the Return Save(False,DEFAULT_TRANSACTIONKEY) should be passing 'Transactional' instead of False.  This probably has already been fix but, I just wanted to mention it in case it hasn't.

Scott