Re: Logic 9.1.1 update has arrived...
Yeah, of course! Any deadline coming up for me equals NO Updates for anything on my production machine!
The update won't write over any settings files or preferences. Logic is good like that. It's pretty transparent about where and what is written to disk.
It's a good idea, for the future, to know where these files are so you can back them up anyways for safety... but sure thing, if not updating gives you peace of mind, then that's the way for you to go while there are deadlines.
Personally, I risked the update last night without cloning my Mac (naughty me!) and all is fine today.
You should add your voice to the growing number of NI customers upset about this on the NI forums. I wouldn't be surprised if full 64-bit support was reserved for a new upgrade... not an update.