New with FRITZ!OS 6.06: -DSL: fixes a problem, that could cause certain line cards to crash when changing settings in the FRITZ!Box -DSL: fixes a problem with bandplan 997 -system: general stability improved
It's not a major change, but both of those fixes are directly applicable here in NZ. We're one of the few countries still using bandplan 997, and I've personally had a line card crash because of my 7390. It's not great when Chorus have to send a tech to the cabinet to physically reboot the card because it's not responding.
I'd recommend doing the update. The online method works just fine for me, and I've used it a couple of times now. Just export your config first, I'm case something happens to go wrong.