Yesterday while attempting to write the new Debian image to an SD card (under Windows 7), ready for my Pi's arrival on Monday, I was unable to get "Win32Diskimager" to recognise the card. It had done so previously without problem. Initial thoughts were that the card had gone bad, but then I found that the card could be seen by other software. Computer reboot did not solve the problem.
Looking for clues I found "DiskImage_1_6" which I downloaded and found it wrote the new image to the card without problem. I also saw that DiskImage is able to write the image from your card to another disk. This I did after using GParted to adjust the original partitions. This will be useful later if I need to rewrite or backup a card under Windows.
The only issue I noticed was that DiskImage does not have the facility to verify that an image has been written correctly.
The download link for "DiskImage_1_6" is http://www.roadkil.net/program.....sk%20Image