has anyone experienced buttons not working on a new unit right out of the box? picked up a second R-07 the other day and of the 4 directional buttons around the record button, 3 of them work (up, left, down) but right is not registering. makes it a pain in the ass to format a new card because you have to press right for that (to go from no to yes). was able to get it to go to yes and format the card after a minute or two of pressing all directional buttons and finally getting lucky, but in general pressing the right button does not work. not sure if it's worth the hassle of shipping it back and getting a replacement for this alone. i should rarely, if ever, have to use the right button again now that the card is formatted. just wondering if this is a common issue or a one-off type of defect.