Comment 5 for bug 886273

I'm going to work on a detailed design for this, but here's what I'm thinking so far:

If Software Updater does an automatic check, OR you launch it manually, OR you launch Ubuntu Software Center, when sources.list is invalid, then:

a. aptdaemon puts up a dialog explaining the problem and illustrating how it can fix it for you

b. if you choose to fix it, an error tracker dialog appears giving you the option to report the error

c. the program launches as normal.

Perhaps (a) and (b) should be around the other way. Or perhaps they can be merged by introducing a new variation of the RecoverableError dialog.