Version:           1.12.4 (using 4.3.4 (KDE 4.3.4), Gentoo)
Compiler:          x86_64-pc-linux-gnu-gcc
OS:                Linux (x86_64) release 2.6.31-thinkpad

I have a very large mailbox (GMail ;-), and with KMail I'm subscribed to many IMAP folders that contain lots of mails.  Which means that a full sync takes quite long (5 minutes or so).  According to my filter rules, the most urgent and important mails (as well as mails to which no rule applies) stay in the inbox.  But KMail checks folders in alphabetical order.  That means, when a full sync is running, I have to wait a long time before getting new messages in my inbox.  It would be cool if I could tell KMail to prioritize the inbox over the other folders.  The GUI for configuring this could either be integrated into the "folder properties" dialog, allowing for assigning some discrete priority (e.g. high/default/low), or, better, an extension of the serverside/local subscription dialog that allows the list of folders to be reordered.