After installing Mac OS X 10.2.6, the cursor does not seem to track properly over right-hand Menu Bar items. For example, when attempting to raise or lower sound volume using Apple's sound icon, I need to place the cursor approximately 1.5 inches to the right of the sound level icon to see the pull-down. This odd behavior seems to be limited to icons in the upper right (both Apple & third party application icons) and not application menu items on the left-hand side of the menu bar.