Post One, Post Two, Post Three, and Post Four preceded this current post.
That situation is that the government and BP now suspect that the well casing and/or the well bore are leaking because the pressure expectations have not been met, the pressure has remained too low within the well assembly.
The early on expectations were that if the well assembly was intact, the pressure would rise to 8,000-9,000 psi, or if there was a leak problem it would be 6,000 psi or less.
The pressure levels have been too low (~6,700 psi) for a conclusion that there is no damage to the well assembly, so it now appears that Figure 3 is the proper graphic depiction for the current situation.
Add to that the data which includes a report that seepage of hydrocarbons (gas and/or oil) through the sea floor into the gulf waters has been detected some distance from the well head:
Given the current observations from the test, including the detected seep a distance from the well and undetermined anomalies at the well head, monitoring of the seabed is of paramount importance during the test period. As a continued condition of the test, you are required to provide as a top priority access and coordination for the monitoring systems, which include seismic and sonar surface ships and subsea ROV and acoustic systems. When seeps are detected, you are directed to marshal resources, quickly investigate, and report findings to the government in no more than four hours. I direct you to provide me a written procedure for opening the choke valve as quickly as possible without damaging the well should hydrocarbon seepage near the well head be confirmed.(Admiral Allen Letter, emphasis added). The next issues arising for investigation would seem to be: 1) how bad is the seep, 2) what is its source, that is, is it caused by a leak in the well assembly or is it natural, and 3) what is to be done about it.
Some of the dangers of the seabed in the area of Deepwater Horizon disaster are discussed in Danger Lurks In The Deep Water series.