Akregator custom update interval

I'm using Akregator 1.6.3 in KDE 4.4.3 on Kubuntu 10.04 and I'm finding that 
it is ignoring the custom update interval option for a feed.

I subscribe to the PlayDeb and GetDeb feeds that at the moment are not working 
as the site is down and have to keep stopping Akgregator from fetching them. I 
have tried changing the update interval to once per day, but it still tries to 
fetch every minute or so.

I also have a feed that I've set to no update, but that still updates too.