Akregator is changing the dates of some of the Linux.com articles to 11/29/99 timed either at 5:59PM or 6:00PM. This is only articles from LIniux.com and not every article from the same author is having the dates changed. I checked the linux.com feed page, and the article dates are correct there.
This turned out to be a problem at linux.com and had nothing to do with Akregator.