@Ivo
Thanks for the pointer to Menu Delay.
I had a similar problem to clamhe, in that when moving (click-dragging) an item up or down the All Programs menu... as I moused the shortcut or folder up/down the menu... it would open every folder until I got where I wanted to drop the item.
Per your post, I went to settings and Menu Delay was somehow set to 0 ...your suggestion of 1000 works better
... is that the default value?
>> Since I use scrolling menus rather than unfolding columns menus, I don't have the associated problem that clamhe mentions... covering up the main menu. As for getting to the Apps menu, you don't have to mouse straight vertically down over Programs to get to Apps... one can make an end-run to the right, move your mouse cursor around Programs to the right, rather than over it, to get to Apps. I'm not sure, but I believe the multiple column foldout (when you have a -lot- of menu items) covering over the previous menu... is how Windows itself worked... so it wouldn't be a bug intrinsic to Classic Shell. It's possible that if you move the mouse cursor to the black bar sides of the column foldouts... that the columns may fold back in, to the original menu. Since they are 'pop-out' columns, moving the mouse cursor 'focus' outside the pop-out columns may cause them to pop-in again, revealing the original menu. Again, I think you should be able to easily remedy getting to the Apps menu by moving your cursor around, not over, Programs ... to get to Apps.
For me, I do notice something about Windows pop-up menus from toolbars, like the Quick Launch menu... only sometimes, the pop-up menu will display a white rectangle and take some significant time before it fills in the menu selections. It's probably a Windows bug, and I don't know if Classic Menu could fix that Windows problem, just thought I'd mention it to look at?
-RD