I have no idea what's causing this. I uninstalled Start10 in case it was the culprit. If I boot with no SD programs running I get a clean start menu. I have not yet tried disabling one at a time and rebooting. Was hoping someone else had seen this and knows which program is causing it and a workaround. As you can see, when I display the default start menu, all applications, there are alphabet letters overlaid over the menu. Turning off all SD programs after a boot does not fix it. Only turning them off and rebooting.
I run WindowBlinds 10, WinFX 6, DeskScapes 8.5, CursorFX.
SOLVED: The problem is WB 10 beta. I contacted Stardock and they had me run the Purge WB tool and then rteinstall. The problem has gone away. I straigh uninstall/reinstall was not enough.
With WB 10.0.5, the large letters on the start menu program list is back, and the above solution no longer works. Uninstalling 10.0.5 and installing 10.0.4 fixes the problem.