nsPrefMigration.cpp in ProfileMigrationController() uses |index| to access the array of profiles to migrate - but it never bumps index. Thus, I imagine, only one profile can be migrated. Analysis from inspection.

-> Profile Migration

Only one profile can be migrated at a time. You may return to Profile Manager and select a second profile to migrate. Is this RFE- migrate more than one profile at a time?

Well, then the code is strangely written, since it works to create an array of profiles to migrate, then ignores all but the first one. In any case, there's something wrong with the code. Dropping severity.

Randell, thanks for bringing up the point. Once upon a time, there was a plan to do migration of all 4.x profiles at a time and that idea/plan lived for short time. Now that we either automigrate in case of single profile (for mozilla we ask the user instead of automigrating) OR present a choice to the user incase of multiple profiles, we should probably cleanup that portion of the code to do the obvious i.e., just to migrate the single 4.x profile. Reassinging this to Conrad as the code corresponding sits in ProfileManager. Conrad, if you do not have cycles, please do reassign it to me. thanks.

It's a small job, but since just code cleanup, putting off to 1.0.1.

Pushing off this sort of thing.

This bug is filed in a bugzilla component related to pre-Firefox code which no longer exists. I believe it is no longer relevant and I am therefore closing it INCOMPLETE. If you believe that this bug is still valid and needs to be fixed, please reopen it and move it to the Toolkit:Startup and Profile System product/component.