Very strange effect when using *:focus::-moz-display-comboboxcontrol-frame

Move the pointer into and out of the table

Move the pointer over the controls in the second table and compare. The only difference between both tables is, that the first one has "align=left"


Please don't tell me, that I shouldn't use internal classes. I was just searchig for workarounds to ohter SELECT-related problems and thought, that this might be a bug.