I used the add to panel applet to add a 'drawer' of common shortcuts to my gnome-panel, but when I click on the drawer icon, it only pops up far enough to see one icon until I mouse over it and hover there for a second or two.
Then, it finally expands the rest of the way so I can click on the other icons.
How can I fix this annoyance?
It's probably bug #108951. You'll note that a patch is attached to comment #62.