This error message will not let me close the pop up message. The error message locks up Aperture3 and I have to force quit the program.
Anyone else found a solution?
Change your Web Preferences for Flickr.
In the Aperture Preferences > Web panel disable the option: "Automatically check for newly published albums".
This way Aperture will not hang, if it cannot connect to Flickr at start-up.
Retrieving data ...