Just encountered an issue, don't know if other have similar problem.
running from a usb pendirve,and upgrading from tc2.3rc3.
copied .setbackgound and .xsession and updated microcore.qz and core elemnets...
backup and restarted. TC seems to hang with a x (cursor).
After some trial and errors,
add the following 2 lines from previous .xsession
export ICONS=`cat /etc/sysconfig/icons`
export DESKTOP=`cat /etc/sysconfig/desktop`
resolved, the problem.
Regards
Carlos