If I was feeling particularly cynical I'd say a firewire bug is something they'll probably ignore for a long time because they're not that bothered with Firewire anymore, they'd rather get you to jump to Thunderbolt or USB 3.0
I dont think Apple cares about either... USB they were slow to implement and Thunderbolt they we're way to quick to implement. Nearly three years since Thunderbolt was introduced in the Mac and I can still count the number of TB devices I've on store shelves with ONE hand... actually, not even that, I've NEVER seen a thunderbolt device on sale ANYWHERE.