iDVD burning issues


Universal Traveler
I used iDVD to burn a movie thats about an hour long (but theres alot of extra content on the DVD as well) Around 45 minutes into the main movie, the dvd will start skipping every 5 seconds or so. I know it's not my DVD player in my living room. And my burning drive is fine because I've made DVD's equally as long before, but I've had nothing but problems since iDVD 5. Could I get some suggestions?

Note: I'm using a Pack of TDK's (DVD-R)