Charger interfere Touchscreen

Unfortunately, the included AC adapter interferes with the touch screen such that, for example, no more text can be entered, already the "pull down" to unlock the screen only works every third time. Have a test basis, the power supply against my old HTC Touch Diamond 2 exchanged (ie dock + cable + Original replacement power supply) and lo and behold, the touch screen works again.
I do wonder how it could ever go into production, apparently I'm not the only yes but the this very obvious problem is noticed. Therefore, only one star.