When I try to connect my Diamond as a USB disk drive it causes windows explorer to hang (Win XP SP2) and it only unfreezes when the USB is unplugged.
This happened with 2 different diamonds (I sent the first one back because of another problem) with both the stock Orange UK ROM and Dutty's 1.8 ROM. It seems to work fine on some other PCs. I would say it was a PC issue but it's not an isolated case - I've seen it happen with a friend's Diamond too, on his work laptop.
Edit: I should mention, it sometimes unfreezes and starts working if left connected for several minutes!
Anyone have any experience of this?