From Jindal's reponse speech earlier this week:

During Katrina, I visited Sheriff Harry Lee, a Democrat and a good friend of mine. When I walked into his makeshift office I'd never seen him so angry. He was yelling into the phone: 'Well, I'm the Sheriff and if you don't like it you can come and arrest me!' I asked him: 'Sheriff, what's got you so mad?' He told me that he had put out a call for volunteers to come with their boats to rescue people who were trapped on their rooftops by the floodwaters. The boats were all lined up ready to go – when some bureaucrat showed up and told them they couldn't go out on the water unless they had proof of insurance and registration. I told him, 'Sheriff, that's ridiculous.' And before I knew it, he was yelling into the phone: 'Congressman Jindal is here, and he says you can come and arrest him too!' Harry just told the boaters to ignore the bureaucrats and start rescuing people.

What Jindal told Human Events in 2008:

There are thousands of these stories. I talked to a sheriff in an area where they had people with boats that were ready to go in the water and rescue people and they were turned away because they didn't have proof of registration and insurance, they didn't bring the right paperwork. The bureaucracy was just awful.

The implication here is that Jindal talked to the sheriff after the fact, not that he was in his office during the moment of crisis.

Presumably, Sheriff Lee could settle this, uh, apparent contradiction, but he died in 2007.  However, Lee did say this, to Larry King:

LEE: I fully believe that when then matter is looked into, we tried to get some boats in the water early on … Those boats where not allowed to get into the water when they were needed and I just found out about seven days later one of the reason boats couldn't get in was they didn't have enough life preservers and some of them didn't have proof of insurance.

Seven days later?  Not at the time of the crisis?