apt-get - ximian stuff removed?

I've had an issue the past few days with apt-get update blowing up. Seems like I can fix it by removing the ximian entry from the source entry. Has something changes in the apt repository like ximian packages being removed for some reason? -- John LeMay KC2KTH Senior Enterprise Consultant NJMC | http://www.njmc.com | Phone 732-557-4848 Specializing in Microsoft and Unix based solutions