My customer has MC9090s that develop a strange fault after being in the field a short time. The keypad gives an incorrect response when a key is pressed, e.g. press "a" and it might return "x" This knowledge base article from 2005 seems to describe the issue, has anybody seen anything like this? http://support.symbol.com/support/search.do?cmd=displayKC&docType=kc&ex…