Running 12.04 and have been applying updates when notified by Update Manager. Up until now the updates have always been applied with no issues. With the latest update, the process stops and a message is displayed "CD/DVD 'Lubuntu 13.04_Raring Ringtail_-Release i385 (20130423.1)' is required. Please insert the above CD/DVD into the drive 'media/cdrom' to install software packages from it."
I could download and burn a 13.04 Lubuntu ISO and follow the instructions in the message, but something is not right here. That is, if I am running 12.04 Ubuntu, why would an update require Lubuntu 13.04?? Has anyone seen this same issue?