Some HTC HD2 owners have now received responses from HTC Support, indicating this is a hardware problem that can only be corrected by returning the device to suppliers:
Dear valued HTC customer,
Thank you for your enquiry about your handset. This is a hardware issue and you can contact your re-seller to exchange the device for another one or contact us and we will send this device to be repair. If these steps have not helped, please let me know by responding using the link provided and I will be happy to check again for you.
Thats not a software problem, our apologies. I can now confirm we have established this being a hardware fault.
Unfortunately at this stage it is too early to determine exactly where the fault lays but it most certainly is not a software related issue.
If you can ask Clove to swap it, please do so, if not we will come and collect it for repair.
You can arrange this by calling 08458900079.
Are you having a Pink Problem? Let us know us know in the comments.