Product Version = NetBeans IDE 7.4 Beta (Build 201307092200)
Operating System = Windows 8 version 6.2 running on x86
Java; VM; Vendor = 1.7.0_25
Runtime = Java HotSpot(TM) Client VM 23.25-b01

Consider this method:
/** Trims all strings in the array. */
void trimArray(String[] s) {
	for (int i = 0; i < s.length; i++) {
		s[i] = s[i].trim(); // Alters the array.
	}
}

NetBeans shows the hint "Use JDK 5 for-loop" ("Convert to for-loop").
This renders the method useless:
void trimArray(String[] s) {
	for (String item : s) {
		item = item.trim(); // Does not do much.
	}
}

In these situations with array assignments this hint should not be shown.