Hamid, 

you wrote:

> Rebuilding all mailboxes will help:
> 
> Click on Inbox to select it.
> Hold Shift and click on the last mailbox in the column.
> This will select all the mailboxes in the column.
> Then, from the Mailbox menu, apply the 'Rebuild' command.
> This will rebuild all mailboxes and hopefully resolve the issue.
> 

Done that, Hamid, but still no joy.

It really is a nuisance. The arrow is a wonderful shortcut and now I am having to go into the Sent mail box to fish things out.

Best

T