Can't add to dock
Also, when I try deleting something from the dock by dragging it off the dock, it shows the symbol with the icon (the "poof" or whatever it is!), but when I release the mouse, it goes right back to the dock. It also does this when I drag it to the trash. The only way I can remove anything is by click and hold on the icon and choosing remove from dock. It would be so much easier to just drag it off.
MacBook, Mac OS X (10.5.4), MacBook purchased new just over a month ago...