Hi you 2,
I have Classic Shell running with DF on W8 with 2 columns. I have a cascaded "Shutdown" link near the bottom of the menu when I click this the fly-out the lower half goes behind the DF taskbar and in that are is inaccessible. This is with default taskbar and DF taskbar x2 high (horizontal). It seems to work fine with single height taskbars. Always works fine on default taskbar. Still same in b11.
Pete

The image should be all you need