No, no it's not.

The issue in OS2007 had to due with some cards not being able to handle the voltage change when it changed when the display went to sleep during a write. This resulted in totally non-functional cards and is not the same thing that's going on in OS2008.

Besides which, I'm not actually convinced that there is a "SDHC corruption bug". It seems like OS2008's behavior towards already corrupt cards is more strict (generally a good thing), OS2008 is being blamed for cards that were already corrupted (but still being used in OS2007) or were corrupted around the time of the upgrade, but not by it.