I have jerky email scrolling and blank .. ie. gray bars for sender and email topic information. the scrolling keeps jumping back up the email list and when scrolling continues to show gray bars for email info. See attached pic. I'm using the mouse pad. I have a mac pro.. no software updates have been made nor any firefox changes. This is happening on both firefox email accounts.. Scrolling, gray bars issues does not happen on Safari browser for both email accounts Thank you Mike