2.4.29 brings us up to date with 2.4.29 final (which contains the recent uselib local root exploit fix). It also fixes a bug in UML which can cause your UML to die without any console output. Thanks goes out to Jeff Dike for fixing that.
How to Upgrade
See if you're already running 2.4.29-linode39-1um by viewing the output of "uname -a" inside your Linode. If not, follow this procedure:

Log into the Linode Platform Manager (LPM)

Configuration Profiles --> Click on your configuration profile

Make sure the Kernel drop-down has "
Latest 2.4 Series" selected and Save

Reboot your Linode
Thanks and enjoy!
-Chris