Hello,
i experiance an already wellkown issue regarding supporting old r52 cards for 5mhz mode and offband operation (shift channels). I assume this relates to http://forum.mikrotik.com/t/fix-5-10mhz-mode-for-n-cards-in-v5-0-beta3/39323/1
I would be really appreciate if you fix support for old r52 cards 5mhz 2,4 b/g mode.
Would have either step back to 4.x version (round about 30 cards)… 
thanks in adance putting this on your fix list, best regards robert