Plain C# console application with not null object. Say you set a breakpoint at some point and you would like to inspect that object -- by unfolding its properties in the object popup.
In Visual Studio (2010) you would see a list of its properties and fields, and the value of given member. If the member throws an exception, there is such message __for this member__.
In XS however if exception is thrown for any of the members, there is such message, but for entire object. Meaning you don't see a list of the members, and you don't know which member threw an exception. Minor thing is, the message currently is phrased in such way one could be mislead that the object itself threw an exception (like having null reference).