Almost the same sequence of events as in the bug description happended to me on the evening of 15th December 2009.
In my case it was a USB flash memory containing Ubuntu 9.10 Karmic and not a HDD, but I assume that has no significance. The bug has had a critical impact for me since it was necessary to 1. format the harddrive and re-install Windows 2. install standard and company-specific applications 3. encrypt the harddrive 4. finalize with personal finetuning In addition, I can not risk to boot my laptop from an external USB flash memory containing Ubuntu if the updates are so unreliable and may cause several days of extra work. -- update to grub-pc writes MBR without checks, prompt or backup https://bugs.launchpad.net/bugs/495423 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs