Agreed. There are dozens of WebKit bugs fixed in every iOS point release. These bugs are usually exploitable on any WebKit browser which includes iOS, Android, and a number of desktop platforms like Safari and Chrome.
It's not the end of the world, but it would be nice to see companies take browser security more seriously.
Charlie Miller suggested that this flaw actually tickles a bug in IOKit, which suggests that it isn't a cross-platform flaw, which makes sense since WebKit doesn't (AFAIK) do PDF.
It's not the end of the world, but it would be nice to see companies take browser security more seriously.