Email app reports timeout, mail still comes in but slowly

REPRODUCIBILITY (% or how often): 100%
BUILD ID = OS VERSION (Settings > About product): 4.3.0.12
HARDWARE (XA2, X10, X10 II, …): XA2
UI LANGUAGE: Swedish
REGRESSION: (compared to previous public release: Yes, No, ?): ?

DESCRIPTION:

Since the previous public release, the mail app keeps reporting timeouts when checking new mail. New mails do show up, but only after the connection has timed out.

The problem does not occur with K-9 Mail in the android emulation, nor does it occur with any other email client on the desktop.

PRECONDITIONS:

Have an email account set up with an imap server.

STEPS TO REPRODUCE:

  1. Open email app
  2. Update

EXPECTED RESULT:

App will contact mail server, get new messages and show new messages (if there are any) in reasonable time without error.

ACTUAL RESULT:

App will contact mail server, get new messages and after a few minutes will show a timeout error and the new messages will show.

The error is: ‘Tidsgränsen för anslutningen nåddes’

ADDITIONAL INFORMATION:

This started happening with the previous update.