THIRD UPDATE: Here’s Carnival’s statement as to what actually happened onboard the Dream:

While at dock in St. Maarten yesterday, the ship’s engineering team conducted a regularly scheduled test of the ship’s emergency diesel generator.  A malfunction occurred which has rendered the emergency generator inoperable. At no time did the ship lose power and the ship’s propulsion systems and primary power sources were not impacted.  However, for a period of time last night, there were interruptions to the elevators and restroom services.  Toilets and elevators are currently working, and have been since about 12:30am.

SECOND UPDATE: Cruise Cancelled and Pax being flown home. WOW

The Carnival Dream has a technical issue with the ship’s backup emergency diesel generator which our engineering team is currently working on. Yesterday, during regularly scheduled testing of the ship’s emergency diesel generator, a malfunction occurred. At no time did the ship lose power and the ship’s propulsion systems and primary power source was not impacted. The ship is at dock in St. Maarten. All guests are safe and comfortable. There were periodic interruptions to elevators and restroom services for a few hours last night. However, all hotel systems are functioning normally and have been functional since approximately 12.30am.
While personnel continue to work on the technical issue we are making arrangements to fly all guests home via private charter flights and scheduled flights from St. Maarten. Guests on the current voyage will receive a refund equivalent to three days of the voyage and 50 percent off a future cruise.
We are also cancelling the ship’s next voyage which is scheduled to depart on Saturday, March 16. Guests scheduled to sail on this cruise will receive a full refund and 25 percent off a future seven-day cruise. Guests who re-book will have their current rate protected on the future sailing.
Additionally, any non-refundable transportation related expenses will be reimbursed.
Yesterday was a scheduled port of call visit to St. Maarten. Guests were able to spend the full day in port and have the option of continuing to do so until their scheduled return home. All of the ship’s activities and facilities are fully operational.
We are very sorry for this disruption to our guests’ vacation plans and extend our sincere apologies. We look forward to welcoming them back on another Carnival cruise.
The Carnival Dream was on the last leg of a seven-day cruise and was docked in St. Maarten when the technical problem arose. The ship is based in Port Canaveral, Fla.

UPDATE: Carnival Statement:

The Carnival Dream has a technical issue which our engineering team is currently working on. The ship is at dock in St. Maarten. At no time did the ship lose power but there were periodic interruptions to elevators and toilets for a few hours last night.  However at this time all hotel systems are functioning normally and have been functional since approximately 12:30am. The ship has full power but is still at dock while personnel continue to work on the technical issue. The Carnival Dream was on a seven-day cruise and is based in Port Canaveral, Fla.

Several news outlets have reported that while docked in St. Maarten, the Carnival Dream experienced “a generator problem.”

Her departure is currently unknown (supposed to be yesterday evening), and she is still docked in St. Maarten as of this morning.

Pax are reportedly not being allowed off. This is to allow the ship to leave ASAP, once they are cleared to sail back to Port Canaveral.

Be prepared for this to get above average media attention since this is occurring so soon after the Triumph incident.