The boot packages are provided by the Raspberry Pi Foundation from a separate repository. They are not part of the Raspbian project, so it is futile to report bugs there.
The 1.20130207-1 versions of the packages also do boot fine. Those are the versions included in the Foundation's 2013-02-09 download image.
Did you do a clean shutdown ("sudo reboot" or equivalent) after the update? Perhaps you have an issue with your SD card causing corruption of the /boot filesystem. The sha1sums of the boot files are:
Code: Select all
[email protected] ~ $ cd /boot
[email protected] /boot $ sha1sum bootcode.bin start* fixup* kernel*
If you kept a copy of the non-working files before reverting them, you can check whether they were correct.