When you cross into JB, Malaysia for you shopping trips, always check your passport when the customs return to you. See this passport stamp, malaysia customs chop the passport but put the date as 32 April? Where in the world have date 32 April?
Malaysia is really boleh. You need to be vigilant and check your passports or you will have problem exiting Malaysia later and they will detain you for this error!
Beware! Do not be lazy!