As far as Vault goes, I never tried. I have tried - thus far successfully - to avoid using Vault. Unfortunately, my company just spent 6 figures on Vault Collaboration ... so I suspect my days of avoidance are coming to a rapid end.
Should be pretty much the same, though. You'll likely need administrative privileges in Vault, though, to edit the content center libraries.
uhhh ... lolwut? I've never seen a message like that.
Attach the part, I'll take a look.
Which parameter were you working on?
Not sure what's going on for you ... fractional precision works for me on your part? What version of Inventor are you using? I know it's something prior to 2013 at a minimum ...