This form is cleared upon hitting back to review it (unless the server is setting a no-cache pragma.) The bugzilla login, I enetered my address, selected the password field. Went to another window, gacve focus to the pass field again, and the cursor was jumping back and forth between address and password

That forms are cleared when you go back is bug 13537. Bug 25773 covers the possibility of having multiple blinking carets after a focus change. *** This bug has been marked as a duplicate of 25773 ***

verified