This is good to know! I've only had my Zoo Med thermostat for ~ 6 months, so far no problems but we'll see after a year or two... Knowing this, it might be good to check out a more costly thermostat, as it would last longer. Big Apple has nice looking one around $50:
http://www.bigappleherp.com/BAH-1000-Thermostat
http://www.bigappleherp.com/BAH-1000-Thermostat