SD card corruption after legal shutdown

[kriticar]

Hi,

My xbian 1.0 beta 1.1 was working fine for weeks and I decided to make a backup of it.
In order to do that, I have executed shoutdown with remote controller from xbmc interface, waited to see only power led on, than I turned off the charger, pulled out the sd card from pi and put it in the laptop.

On my laptop, I have used win32diskimager-v0.8 to create an image.
After backup has been done, I returned a sd card back to the pi, but now I was unable to boot.
Xbian, starts but at boot time after init process, “loading…” faze never ended, so I was unable to boot at all.


I tried to write win32diskimager-v0.8 image to the sd card, which went well, but with the same problem at loading faze.
The image file is OK, and after new fresh installation of xbian to the same sd card, I was able to restore everything from the image and my xbian works fine again.

This happened to me twice.

What would be the possible cause of the problem?
How to debug it?
Does anyone have a clue?

Regards.