Celebrity Silhouette Cruise Critic reports that a unspecified propulsion problem is slowing the Celebrity Silhouette down, causing it to shorten time spent in certain port of calls.

Celebrity does not specify the nature of the problem or indicate when the problem will be fixed.

A Celebrity Cruises spokeswoman provides this gobbledygook explanation: the “slight restriction” on the

Cruise expert Professor Ross Klein’s web site indicates that the Constellation cruise ship was forced to spend an extra day in Key West.

Professor Klein reported yesterday about a passenger’s complaint that the "Constellation scheduled to leave Key West yesterday, Dec. 15 @ 5pm. Repair needed and waiting on part(s). At 8:05am, December 16, still

Tom Stieghorst of Travel Weekly reports that Royal Caribbean may send the Allure of the Seas, which has been plagued by problems with its propulsion system, to an early drydock in order to fix the problem.

The article says the scheduled drydock is not until in 2015, but the cruise line may take the giant