dude... you don't HAVE to upgrade tot he latest and greatest kernel... they are just misc. bug fixes.. read what the changes are.. and decide if you need it.. if not, don't worry about it...
Debian Stable still uses a 2.2.x kernel by default... and it's about the most stable thing you can find... KDE 2.x !!?? c'mon you don't need to be *that* hardcore... but.. i hear that sarge is FINALLY going to be going stable about the end of April... well see...