If you are using Google’s Chrome browser, and having trouble scrolling drop-down lists, please continue to read.
Chrome just recently auto-updated from version 31.0 to 32.0
For some reason, the scroll bars in HTML select elements do not scroll if you try to drag them with your mouse, nor do they scroll if you click in the scroll area to move it up or down. The only way you can get it to move is by using your mouse wheel or keyboard.
Here is a quick fix: http://productforums.google.com/forum/#!topic/chrome/BoarsOZwfYU
team of LIMIT8