The hubbub never broke out here, but on other cruise forums there has been nothing short of acrimony at reports Carnival would ban power strips and electric fans. Some vowed to never cruise with Carnival again if they couldn't bring a power strip with them. Kind of silly, IMHO.
Anyway, Carnival has sidestepped the issue by listing fans and power strips under "miscellaneous concerns" with the following wording:
• Electrical devices such as fans, power strips, multi plug box outlets/adaptors, and extension cords will be removed if determined to pose a hazard and returned the last day of the cruise prior to debark.
Apparently the issue is if the device appears to be in good condition it is okay. If you have something that looks like you bought it for 10 cents at a garage sale, they will take it away.
I would post a link to all the rules but Carnival has done something to their website and I can't link to specific items.
Oh, one more thing. Clothes steamers are listed under banned items along with clothes irons.