I've just noticed a bug with Start8 v1.02 on my Windows 8 Pro 64-bit install.
Basically, I've been scrolling up and down the All Programs list with my mouse wheel so haven't noticed this glitch until now. If I hold down the button in the bar with the left-mouse button and move the mouse up or down to scroll through the list then a large grey box appears and obscures half of the list! This does not happen if I mouse wheel scroll up and down the list.
Here's a screenshot:
http://www5.picturepush.com/photo/a/11349353/img/PC-Games/Screenshot-%2817%29.png
This glitch does disappear if I scroll up (or down) so it goes offscreen. If I scroll back down (or up) then it is gone and I can then scroll up and down without the glitch. If I close the Start menu and then open All Programs again then the glitch comes back until I again move it offscreen. I tried enabling and disabling the Transparency option but it makes no difference.
I'm using 2 x NVIDIA GeForce GTX 680 in SLI with the v306.97 WHQL drivers if that is any help?