Keep getting the message "An error occurred with the publication of album - Do you want to remove the album from your library?" don't know why

I don't know why I keep getting the following messge for a recent album I created in iphoto:

"An error occurred with the publication of album (name of album). Do you want to remove the album from your library?" In smaller letters under that message, is "The feed could not be found or is invalid." There are 2 buttons to click - either "Remove Album" or "Keep Album". Never had this issue before, did not do anything different this time.

Mac OS X v. 10.6.8

iphoto 09 v. 8.1.2 (424)