Version:            (using KDE 4.3.0)
OS:                Linux
Installed from:    Unspecified Linux

When you're writing a mail, you can use "up" and "down" keys to move up and down in message input textarea and move between  the message, subject and recipients fields.

"Down" works without problem.

"Up" works fine too except when you have the caret at the end of the first line of the message input textarea. Pressing "up" doesn't change the focus to the subject field.

If this is the composer window:

**********************************
To: aaa.aaa@aaa.aaa
To: ________
Subject:  Test

 Dear aaa,
etc.
Regards
**********************************

And "|" is the caret, if it is after the comma of the first line of the message,

**********************************
To: aaa.aaa@aaa.aaa
To: ________
Subject:  Test

 Dear aaa,|
etc.
Regards
**********************************

you can't use "up" key to jump in subject field.
If the caret is anywhere else (on the first line), it works.

If the caret is at the end of the subject input textarea,

**********************************
To: aaa.aaa@aaa.aaa
To: ________
Subject:  Test|

 Dear aaa,
etc.
Regards
**********************************


the "up" key works and move in the "To" input field.