I posted last week about a problem with the Context Menu not being created at the correct location. Adam created a sample to illustrate the problem, but did not see the problem himself. However, his sample is definately a case in which the problem occurs, as several other posters and myself have been able to recreate the problem using his sample.
Below is a video of me using his sample to illustrate the problem with the Context Menu.
http://www.screencast.com/users/MatthewBe/folders/Jing/media/c4bb5749-7948-4967-b888-afa93f305013