If I open port 8080 or any other port with arduino yun rev 2, I get this message from the system log "daemon.err uhttpd [1281]: ls: /mnt/sda1/*squashfs-sysupgrade.bin: No such file or directory".
While if I open from a dragun yun card with the old firmaware I see "[0] [NTC] [STR] httpd_run: motion-httpd - Read from client".
I propose that I am at the first experiences with linux openWRT.