"invalid mailbox format" with upgrade to 2.3.3

[Nicolas KOWALSKI]

Andreas Hasenack <ahasenack at terra.com.br> writes:

> I just upgraded a home system from 2.2.12 to 2.3.3 and started
> getting the "invalid mailbox format" error. I then ran reconstruct
> and it worked after that.

Looks familiar to me...

> Before the reconstruct, if I downgraded back to 2.2.12, things would
> get back to normal.

Same thing.

> I remember seeing a similar problem someone had with an upgrade to
> 2.3.x in this list but I can't find it in the archives (or I'm
> mistaken).

I had this problem. 

I also had to reconstruct to make 2.3.x happy. It was probably because
some mailboxes had some garbage in them; for example, the cyrus.index
size of a mailbox triggering this error changed (shrank) after the
reconstruct.

-- 
Nicolas