To make a long story short, I am missing only this dependency:
lib32nss-mdns
If I try to install that dependency via terminal, I get
The following packages have unmet dependencies:
lib32nss-mdns : Depends: libnss-mdns-i386 (= 0.10-6)
E: Unable to correct problems, you have held broken packages.
But I have no broken packages - though I have run apt-get -f install just in case (Well, I had no broken packages at that time. I probably do now, due to what I did below with dpkg.)
If I try to install that lib via synaptic, it's willing to do it, but wants to remove a bunch of meta packages and my printer driver,among other things.
After fooling around with this for awhile, I decided to just install the .deb with dpkg, and see if not having that particular dependency was a big deal.
As a result, crossover tries to do the install itself, and returns with this:
The following packages have unmet dependencies:
libnss-mdns:i386 : Depends: base-files:i386 (>= 3.1.10)
Thanks for any help!
(I have looked at what is here, but it's not doing much for me: https://www.codeweavers.com/support/wiki/linux/faq/Ubuntu/VividVervet)