It boils down to media--especially blogger Jack Bogdanski--taking the pageant to task for holes in the 24 year old's bio. Turns out she really didn't spend much time in Oregon at all.
Which reminds me, since residency appears to be so important to the media now, how about if you check out Senator Ron Wyden's? He lives in New York with his two kids, wife, her business, their home and a bun in the oven. You can start here and here.