[Evolution] Bug#771891: Removing the cache not a good workaround

[Henrik Ahlgren]

I disagree that this issue is not serious since there is a
workaround. If the cache needs to be deleted every time you want to
access your email, it basically makes the program unusable as an IMAP
client. Also, sometimes certain emails do not appear in the inbox even
after deleting the cache. They are just silently discarded, and the
user might be totally unaware of the messages unless he accesses the
IMAP account with some other MUA such as mutt.

Any ideas how to help debug this further?