/* Beware! Tested in FF only. */
/* Works: */
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px),
@media screen and (min-width: 671px) and (max-width: 800px) { /* styles */ }

/* Doesn't work: */
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation:portrait),
@media screen and (min-width: 671px) and (max-width: 800px) { /* styles */ }